I've had drivers who were renting cars to rideshare because their other one was totaled. These are often financially desperate people. Its a predatory situation. You need work and there's this entity handing out work on your own schedule, seems almost too good to be true because it is. Factor in that rental, factor in your car payment, factor in the tires, the maintenance, the gas, the newer model car you need to have for the job, the phone you need for the app to work, the cellphone plan to make that phone work for the job, the health insurance you need to pay for on your own, the unpaid breaks you have to take to pee or eat, and it probably doesn't look so nice.
Traditional shift work low skill labor jobs like fast food are honestly a better option. These days some fast food places are providing benefits, not to mention a path to management and therefore a higher wage. It's not like uber or lyft will ever promote you from driver.