Youtuber uses parts of copyrighted material without permission for content that is shared for free.No one bats an eye. An AI makes something original by training on other people's work, and everyone loses their minds.

Who are you to say what someone using an AI to create art does or doesn't feel when they do it?
What you call "AI generated" art I would say is more accurately described as "algorithmically generated" art.
As it is very much a simple program still piloted by regular people I see these art generating algorithms as being like a very sophisticated brush or pen, one that utilizes different skills to make good art than the more conventional tools: less motor skills but maybe more mental engagement.
Your declaration that one must make with emotion to produce art is narrow-minded, the true source of artistic value is math