Literally every artist copies, it's how we all learn. The difference is that every artist out there does not have an enterprise-class-data-center-powerd-super-human ability to absorb <ALL THE ART> and then be able to spit out anything instantly. It still takes time and hard work and dedication. And through the years of hard work people put into learning how their heroes do X, Y, and Z, they develop a style of their own.
It's how artists cut their teeth and work their way into the profession. What you're welcoming in is a situation where nobody can find any success whatsoever until they are absolutely original and of course that is an impossible moving target when every original ideal and design and image can just be instantly siphoned back up into the AI model.
Nobody could survive that way. Nobody can break into the artistic industry that way. Except for the wealthy. All the low level work people get earlier in their careers that helps keep them afloat while they learn is gone now. You have to be independently wealthy to become a high level artist capable of creating truly original work. Because there's no other way to subsidize the time and dedication that takes when all the work for people honing their craft has been hoovered up by machines.