Well, here's the information I'm going off of.
An emergency is one thing, but autopsy witness Paul O'Connor suggested...
How many decades after the fact is the O'Connor interview you're quoting from? Is O'Connor a forensic pathologist? Does he have any background in medicine?
Here is the interview with Dr. Malcoln Perry from David Lifton's Best Evidence:
It was October 27, 1966.
Three years after the fact. Perry wasn't there first and didn't perform the first actions on the trachea. Carrico did. You also seem to be confusing, as did Lifton, the trachea incision with the incision in the neck.
Here's the Warren Commission testimony of Perry:
Mr. SPECTER - Upon your arrival in the room, where President Kennedy was situated, what did you observe as to his condition?
Dr. PERRY - At the time I entered the door, Dr. Carrico was attending him. He was attaching the Bennett apparatus to an endotracheal tube in place to assist his respiration.
...
Mr. SPECTER - Would you describe, in a general way and in lay terms, the purpose for the tracheotomy at that time?
Dr. PERRY - Dr. Carrico had very judicially placed an endotracheal but unfortunately due to the injury to the trachea, the cuff which is an inflatable balloon on the endotracheal tube was not below the tracheal injury and thus he could not secure the adequate airway that you would require to maintain respiration.
(At this point, Mr. McCloy entered the hearing room.)
Mr. SPECTER - Dr. Perry, you mentioned an injury to the trachea.
Will you describe that as precisely as you can, please?
Dr. PERRY - Yes. Once the transverse incision through the skin and subcutaneous tissues was made, it was necessary to separate the strap muscles covering the anterior muscles of the windpipe and thyroid. At that point the trachea was noted to be deviated slightly to the left and I found it necessary to sever the exterior strap muscles on the other side to reach the trachea. I noticed a small ragged laceration of the trachea on the anterior lateral right side. I could see the endotracheal tube which had been placed by Dr. Carrico in the wound, but there was evidence of air and blood around the tube because I noted the cuff was just above the injury to the trachea.
Perry is pointing out the external incision is larger than the tracheal incision. Tell me you understand this. He quite clearly said he had to sever muscles to the side of the trachea to reach the trachea. He also quite clearly differentiated between the incision to the skin and subcutaneous tissue, and the trachea incision. He made the first incision to expose the trachea, couldn't see it well, cut through the strap muscles to expose it better, and then, and only then, made the incision in the trachea.
Shortly afterwards, Lifton also interviewed Dr. Charles Carrico.
"Could you tell me approximately the length of the tracheotomy incision that was made?"
"Gee. It's been a while. Probably-it would just be a guess-between two and three centimeters, which is close to an inch."
Lifton is asking about the incision in the trachea. Not the incision in the neck.
He also interviewed Dr. Charles Baxter.
The next doctor was Charles Baxter, who assisted Perry with the tracheotomy.
I posed the question:
LIFTON: Now, about what was the length of the incision?
BAXTER: Oh, it's roughly an inch and a half.
LIFTON: ...you could see the incision before they placed the tracheotomy tube into the incision?
BAXTER: Oh, yes. Yes.
LIFTON: So at that time you remember it as being an inch and a half [3.8cm]?
BAXTER: Yeah, roughly.
In context, he's still asking about the tracheal incision. I'm going to repeat my question you never did answer, which is how do you know the size of the trache incision from the photos of the external neck in the autopsy photos?
If you're drawing a comparison, and saying the sizes don't match, you need to tell us how you computed the size of the trache incision relative to the external neck incision visible in the autopsy photos.
Now let's look at Humes testimony:
Commander HUMES - Now, as the President's body was viewed from anteriorly in the autopsy room, and saying nothing for the moment about the missile, there was a recent surgical defect in the low anterior neck, which measured some 7 or 8 cm. in length or let's say a recent wound was present in this area.
You can see Humes is NOT talking about the trachea. He's talking about the size of the external incision visible in the neck.
Repeat after me: The trachea is not the neck. The neck is not the trachea.
You're looking at the external incision [in the autopsy photos] in the skin of the neck, are you not? And you're quoting the doctors on the size of the incision in the trachea, are you not? You're ignoring the fact that Dr. Perry said to reach the trachea, he had to make an incision in the skin and the subcutaneous tissue, and then sever the strap muscles, ergo, the external cut was larger than the incision in the trachea. And that's precisely what we see in the autopsy photos - the large external incision to the neck, not the incision to the trachea.
The relative sizes of each comes from Dr. Perry's & Humes testimony from 1964. No need to resort to Lifton interviews confusing the neck with the trachea in his questions. No need to cite Law's four-decade later interview with O'Connor.
You appear to be comparing two different things and asking why they aren't the same size. Aren't you?
It's not your fault. Conspiracy theorists have been confusing the neck incision with the trachea incision for about 53 years. The two have never been shown to be synonymous. Conspiracy theorists - like yourself - simply assume the two terms are synonymous, and they are not. Dr. Perry said they were not back in 1964. That's a long time for conspiracy theorists to ignore the testimony of the doctor who actually performed the trachea incision, don't you think?
Hank