That's an interesting angle I didn't think of. As someone who lives in California and has gotten to where they are now through various forms of contract work, I feel like this bill is potentially a bad idea, but I can see how it can also shift the "balance of power", if you will, away from California, which would probably be a good thing for the rest of world.
Still, I'm not a fan of losing more freedom, which is what my state government is seemingly doing. If I couldn't work as a contractor this last year, I don't know if I could have made ends meet in one of the country's most expensive cities and have the time to get hired making 6 figures as a software engineer. Maybe, but I imagine it would have been more difficult.
When I was driving for GrubHub, I was making about $17.50 per hour after tax, and the faster I was, the more I would make in cash tips. Not having the freedom to work when I want and only take the delivery orders I wanted probably would have meant flipping burgers for $11 an hour(minimum wage) pre-tax and having to work the hours dictated to me. That's if I could even get said minimum wage job, given that even when I was a college student employers would refuse me because I was "overqualified".
Either I would have had to stick to a job I didn't care for and not take a shot at starting a business, or I would have spent months or years trying to get on my feet on minimum wage without having as much time to do interviews and coding challenges.