Because it's inconsistent. If you allow drivers to work without protections you should allow everyone to work without protections. There are some issues though

Because it's inconsistent. If you allow drivers to work without protections you should allow everyone to work without protections. There are some issues though; for one the state ends up subsidising workers who don't have good unemployment and health insurance. The best solution would be UBI - give people enough money to live on while removing worker protections like minimum wage and mandatory insurances.