Do humans understand art? Does it matter? How do humans learn to create art? By looking at other peoples art, for the most part. Those other artists are not compensated for this either, nor do they need to be credited. If you exactly copy another persons art style, that may be frowned upon by some, but otherwise it is of no consequence, unless you claim the work is actually made by that artist. If you believe that humans should be afforded a privilege that machines (or rather their operators) should not be afforded, make your case on why.
You're the millionth person to make the argument that we should treat AI learning the same as human learning. It's still a bad argument, but I'm getting very tired of explaining why treating a human the same as a computer program sucks ass.
You're the millionth person to make the argument that AI art sucks. That didn't stop me from typing up a reply for you. Why don't you link one of your previous replies?