Funny that you should mention that. My next door neighbor put herself through nursing school on her back, and by renting her place to others in the same profession when she was at school. They were far quieter and less disruptive than the aging couple on the other side of my place.
If it had been put up for a vote, I probably would have voted 'no', but the reality was not what I would have expected.
This of course is not relevant to the discussion, where someone bought a condo which requires accepting the declaration, bylaws and rules and regulations of the HOA. If those rules, which the buyer accepted, forbid short-term rentals, then there's no excuse for doing it anyway.