Buses, trucking, shuttles, delivery, emergency, construction, medical transport, etc. Many exist that are unfilled right now. Explain why they're unfilled and y

Buses, trucking, shuttles, delivery, emergency, construction, medical transport, etc. Many exist that are unfilled right now. Explain why they're unfilled and yet ridesharing has so many people? What rights are missing? Be specific. What's lacking in the power balance? How is different than any other contractor position? Is it a problem if contract writers are told what to write? Is it a problem if contract tech support are told to deal with customers? Why or why not?