Exactly. Proper structural design is all about statics and maintaining equilibrium.
When things are in equilibrium, then nothing is experiencing damaging stress. All designs use a safety factor of 2-3x, meaning no structural components is anywhere near it's bend, break, shear, or crush threshold.
Unless, Logan is moved, or someone sees it to be viably economic for whatever they want/need to do, the Vertex buildings will be there plus or minus forever or the world descends into massive warfare. (I have the image of the professor, Bender, and Fry sitting in the time machine watching wars destroying cities and rebuilding over and over in my head. Not trying to be super bleak).
I don't understand the thought process for the most part. They are there now, and will be long after you are.