That argument is just a regurgitation of the propaganda that these people bought into. You can't possibly know what would have happened because the law was voted down. I think that if those companies severely restricted the number of drivers they allowed, quality of service would decline and they would end up losing market share. In the end, there probably are somewhat fewer drivers, but those drivers are guaranteed to be making at least minimum wage plus mileage and access to health insurance.
I live in California where we attempted to pass a law that would force these companies to hire their drivers as employees. Every gig worker i know bought the corpo propaganda and voted against it. That was when I realized exactly how much of an education and media literacy problem we have in this country.
I grew up in a house with smokers, picked it up as a teenager and smoked a pack a day for 20 years after that. Now I can smell someone lighting up 2 blocks away.
It's kind of crazy. As time passed without smoking, I noticed many things smelled differently to me. For example, I was repulsed by the smell of cheddar cheese the first time I smelled it after quitting. I can't put it into words properly but it smelled so different from what I was expecting that the thought of taking a bite made my stomach turn.
I bet that's partially because they were expensive.