Doing Uber as a part-time job during the most profitable hours makes a lot of sense - that's clearly the best hourly.
You mentioned a few times that Uber could lower its fees - this seems super unlikely since they are already losing money on most uber rides, the company has almost never turned a profit actually. If anything I suspect they would have to raise rates to turn a profit, but right now they're facing tons of bad publicity as it is. Tough spot