Appropriate is the wrong term, sustainable and viable are the real consideration.
There's a market equilibrium between users, drivers and facilitators (Uber/Lyft) for this service but the current ratio is unsustainable.
Could be an outsized supply of sub-min wage labor available to the gig econ because of a lack of availability elsewhere. It might be the only path to work for unskilled labor in high min wage markets.
Biz shouldn’t be forced to cap margins but good margins will bring competition