"your proposal would harm young artists who need to share their works in order to gain publicity for something they intend to sell and sustain themselves on."

The default is already for young artists to share a lot of their work hoping to get noticed. Getting rid of copyright would be reorienting the whole system to center that experience more rather than the established artists and art producing corporations who now are in a strong enough position to charge. "Making it" would just mean that your patreon was doing gangbusters rather than selling a lot of copies of whatever your art is.