> It is pretty common for mid or senior level white-collar salaried jobs to have a decent amount of freedom in working hours within what is functionally reasonable for their role.

That is so disconnected from reality for the majority of American workers that you might have broken me. But lets start with salaried workers have a job .. Their employers don't care what time you work as long as you get that job done. How exactly would that work for Uber? quotas? avg 2-3 rides and hour or ur fired?