AirBnB is inferior now because those hosts aren't necessarily designing it for business travelers. They don't have the insight to accommodate that audience. Or maybe the places you are booking don't get a lot of biz travelers.
I'm specifically only hosting in destination places because when people are on vacation they are inherently happy. Not saying you are unrealistic or unhappy, but it's a different mindset and you have different needs.
So yes I agree with you - it takes a lot more effort for you to have a good, consistent experience as a business traveler because you have to spend time wading through listings.
But there's no reason why AirBnB can't solve that by creating a standard for what business travelers want - perhaps a business superhost designation. I don't think it's overblown for them to put a hurting on the hotel industry. All it takes is for them to take a decent chunk out of RevPAR and many will be done. Hotels typically have a 5 year cycle and they've been having record years. So it's definitely overblown as of now. But killing the investments in hotels is more about what happens when you steal share during the bad times. And also - what happens when there's a good AirBnB rewards program to lure business travelers and they can make it easier for them to book and be consistent as you mentioned?
The hotel industry will remain, but there will be a lot less inventory and operators may decide they don't need to fly the big brands or can't afford the fees.