Because you don't live in a cartoon but In a complex and layered world where things have fucking shades blud. I'll give you my personal experience as an example

My great grandfather from my mom's side made my grandmother inherit a very small apartment in a neighborhood in the periphery of my city which she gave to us (earlier on we lived with my dad's parents) . If it wasn't for that we would either be homeless or be all living in my grandparents' house. 9 people in a single small apartment isn't an ideal thing.

Recently a few people nearby have moved away and put their houses on sale and thanks to that we will finally be able to move to a slightly bigger apartment which will allow me and my sister to have our own room and a decent internet connection. Are we the assholes if we rent our house in order not to force my parents to work 200 hours a week since salaries here barely reach 800€ a month? My mom earns 800€ a month, my father it depends according on how many times he will work (he's gotten many fractures and can't do much) and I earn 300€ a month. I just want to get educated quickly and move away from this shithole of a region

So we are heartless monsters I guess? We will rent to students for relatively cheap. I understand your frustration but what we need is strong national regulation, not banning renting houses altogether, even because it would make house prices skyrocket even more since the supply of available houses isn't enough to satisfy everyone right now if we exclude secondo homes and rentable ones. I didn't know it was that way in America but not all of the world works like that.