Hotels are a regulated industry for a reason and Airbnb is completely flouting the rules. No one wants to be a next-door neighbor to an Airbnb'ed apartment, and hotels are a more efficient use of real estate for housing a given number of tourists.
So yeah, they're helping out tourists, but they're harming all the people in the city who live there and need a place to live. If you're primarily a tourist then Airbnb is good for you; if you live in a high cost city then it's most definitely not. And more of us are in the latter situation, me included.
Rentals have been a thing since people have been travelers. It's easy to point a finger at Airbnb, but a lack of affordable housing existed long before they were around. You could argue that hotels are using space that could be used for housing locals, too. Is Airbnb a factor in prices going up, yes. Is Airbnb the only factor, clearly no.
AirBnB is not rent seeking though I’m dubious of its value to society. People buying property in RESIDENTIAL areas to be used exclusively as short term rental units are rent seekers.
So yeah, they're helping out tourists, but they're harming all the people in the city who live there and need a place to live. If you're primarily a tourist then Airbnb is good for you; if you live in a high cost city then it's most definitely not. And more of us are in the latter situation, me included.