That sounds like the sort of thing that could easily be fixed by making it not legal to do that lol
It’s not a problem inherent to apartments, it’s a problem with lack of regulation in your area.
But more importantly, if that many people need housing, it’s better to put them in apartments than single family houses. Less nature will get destroyed. What are we gonna do, not give them housing?
The point of the graphics is 100 homes vs 100 homes. If you say “well, in the second picture developers would just keep building” then you’re comparing 100 homes to like 1000 homes. It makes no sense.