You have to keep in mind that prices are, generally, not magical. The price is a balance between what people are willing to sell something for and what people are willing to buy it for. Of course that's elementary, but thinking about this will explain why drivers, in general, will not be well paid.
Driving is a low value skill that the vast majority of people have, and if they don't have - they can learn it rapidly. Let's imagine now being a driver was lucrative. Well you'd have a ton of people racing to become drivers, no pun intended. But with so many people willing to drive people around, it'd mean a shortage of work for all the drivers. And so somebody would offer to drive people for a little bit less. And that'd repeat on downward until we reached the equilibrium point at which not enough drivers were willing to go below.
There are some exceptions like truck driving where people spend hours and hours on the road driving vehicles that do require some degree of skill to manage. And so the wages there are still pretty decent. It's not just driving per se, but unpleasant work that requires some degree of skill.
Ride sharing apps bring market efficiency. If you're willing to drive for $x and people are willing to pay $x, well - why shouldn't you be able to? They're still centralized of course, but I think it takes us one step closer to decentralizing the entire industry which would be amazing, as it entirely removes the middle man and let's people simply directly offer and purchase each others' labor. Of course this ideal is pointless in this particular case as automation is imminent and will super-centralize the industry. Although there prices will likely be lower than even a decentralized market could offer.