So because of the reasons you listed, there should be no competition?
Can we leave it to the consumer to decide which service they want, and what risks they are willing to take?
Can we leave it to the worker to decide which company they want to work for (taxi vs Uber, vs another line of work).?
I am just wondering who this is hurting by allowing competition, and by what criteria we/society decide that trade cannot happen between two consenting adults.