So yeah, you don't have to clean as well as a hotel if you don't want, you don't have to pay the taxes as a hotel or even a regular long term rental unit if you can get away with it (thinking IRS will consider a portion of your house converted into business property and thus subject to business property gains tax when you sell the house, but not limited to this), you don't have to follow or even give notice that you don't follow ADA, on and on, because AirBnB doesn't verify any of this and it's claimed it's not their responsibility to do so; but they also don't support even a licensing program by municipalities and rental history reporting so that these municipalities could do their own verifications.
Basically if you even the playing field across the board between an AirBnB and hotel, you end up with something like an actual Bed & Breakfast (although typically without breakfast but often with access to a kitchen). All things actually being equal, even price per square foot, I'd probably pick an AirBnB, but I actively avoid it whenever possible because I think their success mainly constitutes free loading (and enabling it by property owners)
I suspect Google was trying to do the same with Google Fiber, but found the opposition (in the form of AT&T / Verizon / Comcast / TWC / Charter / Cox) was too organized and entrenched.
I don't feel Airbnb is particularly innovative on the technology side; they're just exploiting a combination of inefficiencies in government regulatory mechanisms and the naivete of inexperienced landlords.
There are plenty of horror stories about houses being trashed, etc. that professional landlords will cover with insurance (and that add to the price of a rental). By not being experienced enough to cover themselves, many renters expose themselves to a huge amount of risk. As the horror stories propagate, they will look to reduce their risk in other ways such as discriminating against renters that they have pre-existing biases toward.
Given the amateur nature of their landlords, I don't see a real way for Airbnb to stop this type of discrimination other than by providing insurance coverage -- which, of course, would significantly raise the prices of Airbnb rentals and likely force many hosts who are already operating illegally (i.e. against the terms of their leases) from the market. No insurance company in the world would be willing to underwrite a policy for damages that are already prohibited under an existing contract.