They shouldn’t post their art online then. I draw digitally and on other mediums. I have used AI as a base when I have an idea but need a visual representation that matches what I see in my head and work off of that. That is what AI tools are meant for. You do have lazy hacks who just pump out ainart and don’t alter it or barely alter it and sell it.
There’s no point in complaining about AI. Adapt and learn to use the tool. Just like trad artists bitched when digital artists began being recognized as artist like they should have been. Different medium same outcome.