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"Pretty shitty how baseline human activities like singing, dancing, and making art got turned into skills instead of being seen as behaviors, so now it's like 'the point of doing them is to get good at them' and not 'this is a thing humans do, the way birds sing and bees make hives.'"
I think you missed the point. It's not about income at all, it's about expression. Not speech, expression. It's about how today most forms of human expression are viewed as only valid if that activity can support a person by making money. Rather than expression being valid because a person expressed it.
Now there has always been people who were particularly talented at expressing themselves and were valued because of it. OP's point is that as today society says that no one should bother expressing themselves unless they're one of the talented people who were fortunate enough to turn it into a career. Which is bullshit, express yourself.