For a human it takes time, it takes effort, in order to copy/learn someone's style. And the outcome is not guaranteed to be a success. There is no problem with AI, but if you generate an image with words, something like: make a painting in the style of "X artist", then maybe compensate people for their work and everybody else included, whose expertise was used during the creation of given art.

So you want an image? For 5 bucks? You get an image that's worth 5 bucks, but not an image that costs 1000 dollars to make in real life.

The problem here is you giving a simpleminded person access to an AI, and for a few bucks, this person can generate something that uses thousands of man years of expertise for that given work.

I hope you see the potential slippery slope here.