You and I seem to travel in the same way, but I know many people - even of roughly my generation, late 20s/early 30s, who literally don't know the right tools or communities to plan a trip like that. Its guidebooks, maybe some YouTube videos, and mostly things like Pinterest boards that get used to plan a trip. No trips to the local destination's subreddit, certainly no use of Google Translate to read some local media/magazines, etc.
For a lot of people, "tourist trap" doesn't register as a thing - those are just the things you _do_ when you go to whatever place you're going to.
If Airbnb becomes the safe, convenient, well-marketed way to discover reputable but not stereotypical local experiences in a marketplace that takes your credit card, they could do well IMO.