School isn’t just learning the stuff in the classes. It’s the shared experience too. It’s the teachers holding you accountable for learning.
“Going to school” is a very different thing than just trying to learn on your own. Self motivation and time are a huge barrier for a lot of people. I think the OP was imagining being able to go to school every day and just take classes for free with other people also interested.
I think that this is making fun of the people who were upset at Ariel being black in the remake. The people this is making fun of don’t care about recasting race until it’s done from a white character to a black one. It’s pointing out hypocrisy.