And, on the other hand, if you actually have a specific vision of what you want to create, it is often quite difficult, or actually impossible, to get an AI to generate an output that fulfills your particular vision.
I'm also learning to draw. As a counterpoint, I found it quite fun and enlightening to use artwork I like as practicing material. You can learn a lot by trying to copy parts of an artwork (without tracing and without uploading the result anywhere) : By copying, you still actually have to draw the artwork and deal with the same challenges that the original artist did - however you can use the original artwork as a sort of guide or cheat sheet on how those problems can be addressed.
I found it often even gave me a deeper appreciation for the original artist, because you see all the small, individual decisions they had to make to eventually get to the artwork - it felt sort of similar to reading code and trying to get into the head of the original developers.
You can also get creative and only copy parts of the artwork or stitch together a new piece from different sources - essentially doing by hand what image generators do automatically. (Just don't upload your new artwork anywhere without contacting the original authors first)
I've been an "amateurish" guitar player for 30 years. I play chords, I do some OK picking and I love trying to "play" songs I like, even if badly played (I like speed metal and shredding, which I know I will never master in my lifetime).
Nevertheless, I do it because I like it, I've seen Satriani, Oscar Lopez, Steve Vai play, and I know I'll never be like them. However I don't think "why bother". I enjoy playing basic guitar some afternoons in my living room, and my wife enjoys listening to me while reading a book. I've always played for me first, and because I enjoyed it.
It is a very rare opportunity that we people have the ability/resources to do something just because we enjoy it. With the advent of this wave of AI, we will need to learn to do more things that way.
Same here, it's extremely hard to find motivation when I know every idea I have has been done better by someone who isn't me, or recently by a computer. In either case I can't meaningfully compete and if it's been done better, why do it at all?
This applies to art, but even more broadly than that. I get no satisfaction in creating something when I can see people who have done it far better than me via a quick search.