Really? A specific community wants Airbnb and Uber. Other specific communities do NOT want them. Most rental companies and condo associations probably do NOT want Airbnb. Cities may or may not want Uber (at least not outside of their control & tax claws).
Airbnb & Uber are able to be cheaper than their "competitors" (hotels & cabs) at least partially because they don't have to live by the same rules: taxation & regulation. People that I know that like these services use them because they're generally cheaper than the alternative (also the cool app, certainly). They pay for them because the alternative is to pay more elsewhere. That's the friction caused by taxation and regulation, at least partly.