Earlier quoted context omitted.
Nice big fat red herring. Health care as a discussion point in the contractor vs. employee topic is relevant for only one country on the planet. The important benefits of having a job as opposed to gigging can be summarized as "the employer should not have complete power over the employee". For Uber drivers this is exactly the case, that's why this type of work is socially poisonous.
The definition of a contractor is in fact the opposite. Employees have to obey the hours and other conditions set by the employer. However, a business is not allowed to set such terms for a contractor - in general the rule is you can tell a contractor what you want done and what you’ll pay but you can’t tell them how or when to do it. I think what the OP was getting at is perhaps US centric, but basically Uber would…
Contractors for low skill work is exclusively a means to avoid the overhead of having an employee and all the worker protections that entails. The "contractor" has no negotiating power, and no protections normally given to employees. For the Uber "contractors" it's the worst of both worlds while Uber get to have their cake and eat it too.