I am posting this while sitting in my NYU dorm room. They are kicking students out and will likely become a temporary hospital according to some emails we received.

For a reason. Dorms are shared everything. Not really a great place for isolating people.

Isolation isn't necessary if they're all infected with the same virus.

Does isolation reduce viral load?

They're only shared everything if they're full. Could easily isolate lots of people, just with much lower capacity than the dorms hold in normal times.

Most dorms have a single shared bathroom per floor.

Yeah but renting just one of those dorm rooms would use up more than half of the stimulus budget