Usually if you're working a stressful, low paying, dangerous job it's because you don't have many other options. I'm pretty sure "just get another job" is easier said than done for most Uber drivers
I think Uber is openly stressful, but is not transparently low paying or dangerous and that is why people are working it. On face value, it seems easy to earn with your existing vehicle, but most drivers dramatically overestimate earnings after depreciation, fuel, maintenance on their vehicle. Additionally, Uber puts the driver in the most dangerous situations (pickups and drops on active roadways) which aren't apparent to the driver. Driving for 6 hours a day will eventually wear on you.
So, yes, I think drivers severely underestimate the risks and rewards and that is why another job is likely better (which is loosely defined here)
