I have zero experience with networking hardware. How hard is it to recable an apartment for a newb like me? How does that even work, do I gotta pull wires out of the walls?

It’s such an echo chamber that you’ve gotten a number of downvotes just for providing your perspective here

Vacancy rates in the places where people actually want to live are really low. Besides, are people not allowed to have vacation homes?

Market price is a function of supply and demand. We’ve been under building housing for years.

The most important part of what you said is that you’d build “SO much” housing. If we’d just let the free market build all the housing it wants without letting NIMBYs get in the way, we’d have largely solved the housing crisis.