"Just allow the construction of much more housing (and as already talked about in here in a previous reply, because it is market rate private sector construction, no public funding is needed for the housing construction) . That's it, that's the policy. "
That's something I've already said I support. I'm opposing your "It's no longer a personal choice" attitude as it's so connected to your completely terrifying hate mongering and your obsessive blame against random regular people.
"However, NIMBYs tend to be heavily engaged in local politics."
Sounds like your great ideas don't have the support that you think they have, if there are so few people even bothering to politically oppose the people that you hate so much.
Maybe you should focus on forming arguments that point out how people that are already living there will benefit personally from your ideas, instead of going the Hitler path and blaming so many problems of society on some (according to you) tiny minority. Seriously. Replace "NIMBY" with "Jew" in your last comment and see for yourself how you sound.
Anyway. Read this: https://www.self.inc/info/empty-homes/
And please reread the sentence several times: "There are 33 empty properties for each homeless person in the US"