pretty much it is the same in consulting or any other freelancing industry, the customer always picks given the parameters ( availability, price, skill, experience etc) are acceptable. You can only choose to accept or deny as freelancer. It is always a demand driven, not supply driven.

You can choose to drive for other platforms today, you can directly engage customers ( uber drivers in my country occasionally ask you to cancel and pay directly) all of this would be illegal if they are employees.