Right now, copyright is a significant discouragement to any other entities from taking a story I wrote and claiming it as their own and preventing me from ever growing an audience for my work. It’s far from perfect, and I can’t afford litigation, but it enshrines a cultural value of allowing people to create things and be known for them. Profit is a side effect of this.
Art is already poorly valued compared to the enormous investment time and energy required to produce it. Removing copyright means you can’t even have minimal protections from a more popular person erasing you.