More affordable, no. In my recent travels to NYC and SF, I was always able to get a hotel room via HotelTonight or Hotwire cheaper than an AirBnB unit. I know its not always an apples-to-apples comparison but even for just a private room (not an entire home), an AirBnB in SF is $100+/night.[1]
All that to say, I think you're wrong.
[0] https://medium.com/stay-woke/i-read-about-this-phenomenon-of...
[1] I randomly checked Dec 18-20 in SF. Hotwire has a 4-star room for $91/night. Most AirBnB private rooms are the same or higher.