Do you realize that most Uber drivers aren't working it as a full time job? They're working when they have downtime and can make a few bucks.
Isn't the entire point of "minimum wage" because of thinking like this? Most people working at McDonalds making minimum wage aren't doing it full time either. The minimum wage laws are trying to enforce that a person's time is worth a minimum amount, regardless of the total number of hours worked.
Because other low effort jobs don't let you start and stop whenever you want? Because other low effort jobs don't take anyone with a car and clean record? Because lots of reasons.