homeless people are already trying to build that but the so-called "protectors of law and order" keep showing up with bulldozers for some reason, as if they actually want people to be sleeping on public transportation instead of in their own private tents. This is probably because they get paid proportionally to how many people they catch sleeping on public transportation.
People sleeping in their own private tents on public land in urban areas is as much of a problem as people sleeping on public transit is. I want protectors of law and order to catch and arrest people sleeping in tents in public parks just as much as I want them to do so for people using public transportation as shelter. If there isn't enough law enforcement resources to do both and it's necessary to prioritize, then I would reluctantly say to prioritize public transit, simply because public transit is more enclosed and so it's harder to quickly get away from people who are a threat on it. But ideally we'd do both.