AITA for getting an Uber driver fired

I'm always very generous with Uber drivers. I know that if their ratings fall too low they get deactivated. I know for them 4 stars is bad so I always rate 5 stars unless they do something terrible. Which happened. I sent an Uber to get my 14 yo son because they closed the schools early due to weather and I was at work and couldn't get him. So I sent him an Uber. My son texted me saying the Uber driver wants to cancel the ride and for my son to pay him in cash what the ride cost because they typically make less than the cost of the ride. So he wanted to cancel my son's ride and my son just pay in cash the 20 dollar. I called me and could hear the driver on the background. I told him no because I want to be able to track him. He's 14 in the car with a stranger. He told the driver that and I could here him say "If your mom doesn't trust you in the car with a stranger than why did you send you an Uber." I was upset and about to cancel myself but he did take him home. He just had an attitude about it. I reported him because that's so weird to me. I get wanting more money but we know this is weird to try to pressure anyone into. Especially a minor.