So, that they can be sued or lose lots of profits to a competitor if they don't have a fully safe system.
Large US airlines have a huge incentive to ensure that flights are safe. It is not only that they are afraid of losing market share if there is a large accident (and of course the loss of reputation for loss of life) but the average payout per killed passenger is $4.5 million.
In Germany, Lufthansa, the main carrier of Germany, owned a discount carrier where the pilot deliberately drove the plane into the ground, killing all on board. But in Germany the liability is limited to something like $75,000 per passenger instead of the $4.5 million in the US.
Which makes me more interested in flying with US carriers than, say, German ones, But also Uber/Lyft rather than "co ops."
This is real value provided. An especially important to women and the elderly who are most at risk from a problem driver.
More generally, I'd push back a little: socialism strives to have the workers own the business (broadly, the economy) but there is of course still management and a need for QA, R&D,etc.
I like to point to Vanguard as an example of socialism that works well while people don't even realize it. The people who own Vanguard mutual funds and ETFs are collectively those who own Vanguard and control its direction. There is still a lot more than the service of a mutual fund that Vanguard provides, to the extent we don't realize its inverted corporate structure is a kind of cooperative. And all the time, the owners' financial interests come first in providing low-cost exposure to equity markets.
Why hasn't the broad mutual fund market engaged in a race to cut fees with each other? In fact it has been Vanguard's fees which have usually pushed others' lower.
That's not an abstract hypothesis. That's what happened to the Yellow Cab Co-op in SF.
Vanguard is a decent example, but it's in a unique market where information is shared very widely and customers are extremely sensitive to price. And nothing other than price relative to returns.
As for my personal knowledge at implementing this: I don't know how it can be done since I'm a scientist and not a business analytics person. But I know that a cooperative could compete well against the taxi cab industry. Perhaps not against Uber which broke lots of regulations to become an entrenched force in the industry.
Disengaging, I don't like to discuss with those who attack others while ignoring the evidence brought forward.
In Jacobin's world, the only person providing value here is the driver. In the world the rest of us inhabit, things like the star-rating system and the dispatch system are valuable too.