>Private transporting is not sustainable
Says who? Just because you say it, doesn't make it true. Private transporting has been with humanity since ancient times. It's not going away and it's sustainable.
> and it is not something that has to be affordable for everyone, even less by lowering workers wages or playing with the tariffs by demand.
It's nice that you aren't price conscious when taking 'private transport'. And you're right, uber opened up the market to people that could not afford (or could not justify) taking a taxi before. You see that as a detriment, because you have money but others may disagree. That was certainly me in Uni when I walked home in the middle of night, through sketchy neighbourhoods, because my city's public transport ended at 2am, and I wasn't about to pay $40-$60 for a cab ride (assuming it showed up at all).
I actually started using Uber when during a trip to Chicago I got shafted by several taxi companies who simply wouldn't pick me up from (I guess) the neighbourhood I was in .. in the middle of November. That was the reality of taxis pre-uber. Everybody hated them. They were openly discriminating by geogrpahy and ethnicity. They were expensive. They were also unreliable. And you had no options.
>Taxi regulations gives us passengers safety and fair prices.
Tax regulations, especially in cities like New York, protected taxi cab companies (and the private equity firms that owned the medallions) and created a medalion bubble which made running an independent taxi almost impossible and benefited only the medallion owners.
It's also a false choice. Muncipalities can (and do) certainly set safety standards on Uber and Lyft.
And by the way, many of the regulations that Taxis operate under came as a result of taxis scamming and cheating people (especially tourists and forgeiners) out of money. And it still happens if you travel abroad ... speaking of which, when I'm abroad and Uber is available, it really does remove the language barrier and is immensely helpful in navigating a non-english speaking city.
>We have to promote governments that support affordable and good quality public transport,
'Private transport' is public transport. It is part of the mix of public transportation. Every option you provide that disincentives car ownership is a benefit.