If you infer something from two equivalent propositions, it is redundant, because you can infer it from only one.
laca it really does not matter, the fact is that you actually claim that 1-dimensional space is no more than a collection of distinct 0-dimensional spaces.
In that case this collection is complete only if given two distinct 0-dimensional spaces there is no additional place for more 0-dimensional spaces between them, because if there is an additional place for more 0-dimensional spaces between them, then the completeness of this collection is not satisfied.
In that case you have to decide to take one of these two options:
Option 1: The collection of 0-dimensional spaces is complete, but then we get the following contradiction: Two distinct 0-dimensional spaces have 0 distance between them.
So option 1 is invalid.
Option 2: The collection of 0-dimensional spaces is incomplete, because given arbitrary distinct 0-dimensional spaces upon infinitely many scale levels, there is always more space for more 0-dimensional spaces.
Option 2 is indeed the valid one, but this more space is strictly greater than any amount of distinct 0-dimensional spaces, which suppose to completely fill (or cover) it.
This strictly greater space is, surprise surprise, not less then 1-dimensional space, and we realize that 1-dimensional space is not defined as a collection of 0-dimensional spaces.
Laca, your reasoning is an invalid dead end street, exactly because you claim that a 1-dimensional space is no more than a collection of 0-dimensional spaces.