In a capitalist worldview, which is indeed the system we live in, your point makes sense. However, creative endeavors existed well before the ability to profit off of them. If I didn't want for money in my daily life, I'd still be intensely motivated to create, as it's one of the few things you can genuinely love doing regardless of if it's making you money. Being creative is magnitudes more "basic human instinct" than making money will ever be, and I don't buy for a second that "nobody would create anything" without the profit incentive. I do think that we would have a very different system for sharing our creativity without copyright, and it'd arguably be a better one than what we have now.