If I’m somewhere with a group for longer than three days, we want to be able to hang somewhere and cook our own food. The only other thing that offers this feature set is private rooms in hostels, and those are both rare and nearly always fully booked.
I’m not saying having a good base for vacationing is anywhere near as important as residential housing supply, but saying “just book hotels lol” takes a very dim view on AirBnBs.