more to the argument than this...
I don't know enough about the rest of the world, so I'll stick to London.
Uber seems to meet a need, AirBnB similarly. I have used neither of them. A few years ago Taxi Drivers were up in arms about those bicycle rickshaw things claiming they would bring the end the world as we know it. Doesn't seem to have happened. No incumbent welcomes competition.
The argument here seems to hinge on the "community" theme, we are all in this together, etc. So what will Uber/Air do to undermine that? Well, if we all agree with one definition of community: nothing at all. Personally I don't care about the schools I don't need, the public libraries I don't use and so forth. Of course I live in a Local Authority that seems to be efficient in both collecting and administering local taxes, so they are low and I am quite happy. YMMV
Those that argue for mechanisms other than competition highlight the accompanying evils but underplay the resulting choice and diversity. Don't like the wages? Do something about it. Don't like the prices? Don't buy it then. But what are the options in the absence of competiton?
Remind me again, why the tube drivers are taking strike action and what alternatives I have?
The Grauniad says it's about working patterns - OK but is that every tube driver*? (in the same way some shops are happy to open on Christmas day) and what about the user demand for a 24 hour service?
The world was going to end, according to some, when buses went cashless - doesn't seem to have happened.
Sure society needs some oversight, but always beware of special pleading and always ask "qui bono?"
* I'm grateful as ever for the Daily Mash view no thanks, we're paid enough