Originally Posted by sol invictus
That's the secret handshake that clarifies the key point. I didn't realize the real difference between gravity and quantum field theory.
Originally Posted by arthwollipot
At some point this always happens to everyone, we just have different levels of graspingness. The closer we get to the frontiers of physics, the farther we get from things that can be readily explained to non-physicists. Popular level explanations, in order to avoid complication, usually imply that physicists actually know
things that are in reality not necessarily well known.
String theory is as far out on the frontiers of physics as you are going to get. Most people who have opinions about whether or not string theory is worth pursuing are far short of the level of graspingness required to actually know what they are talking about. This is true even for people with a physics background, if they have not studied string theory in considerable detail. My own expertise is in physics, but mostly atmospheric physics. I have no direct experience with quantum field theory, quantum gravity or string theory. I am dealing with my own level of graspingness here and myself learning things as I go.
So welcome to the "limited level of graspingness" crowd.