I kind of find myself being more sympathetic to landlords in this case. Yes, if everyone did that there wouldn't be any space to live, but looking for short-term subleasers is also a lot more risky. They need to be found, first of all - you're competing with every other of their residence choices - and after that, they have a greater risk of damaging your property. But if after this pro/con analysis, it is economically better for you to do short-term leasing - I think you should be able to.

Also hotel safety laws do not exist in a vacuum. AirBnb renters should be properly informed that the building they are entering has passed building inspection codes, but cannot guarantee hotel-level hygiene and fire code safety. Once fully informed, if the renter still chooses AirBnb, it's their call. People can sleep over at their friends' houses, or at strangers' houses without exchange of money anyway - the fact that money does change hands doesn't change the facts about the parties involved.