I think, in the short run, some have reason to worry about their skills. AI does make digital skills more important and manual drawing skills less so.
OTOH, I don’t think it’s reasonable to worry about styles. Go to aliexpress or some such place and look for paintings. They offer cheap “handmade” paintings and replicas of famos works. They don’t offer novel paintings in someone else’s style. I don’t believe there is any demand for that.