(edit to give some body to my comment above:
Hosting a great dinner party is hard work and requires coordination between food, decor, seasonality, people attending, etc. It is akin to a director coordinating the parts of a film. So I do think hosting a good dinner party can count as artistic expression.
I don't know the parent comment's intended reading, but I was reacting to the idea that typing a Sora prompt makes someone a good artist. If the parent means instead that AI allows people to coordinate multiple media in a broader expression that was not possible otherwise, then I fully agree.
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I didn't say "AI art makes you a great artist" I said it helps you make great art
Tools allow people to express themselves at a higher aesthetic level without needing the extreme technical skills.
GenAI is a tool that lets creators of one medium expand to other mediums without much effort. Like having transcripts auto-generated for a visual podcast, just in the other direction. Low budget (or amateur) poems/songs can turn into short videos; or replace generic album art with better quality generic album art.
The draw will be the primary medium, the rest will just be an extra bonus.
I've updated my comment to explain my view, which I think closely aligns with yours.
When cameras were harder to use, you had national geographic taking you all over the world to photograph different locations because only you and a handful of people knew how to take a picture properly. Now you just hire a local person with a camera to go take the picture you want since it’s much easier to use a camera.
You had people doing photography for ads, now stock photography will do for most brands.
You had people buy high school portraits, I am not sure if people buy those anymore, but a picture of what you looked like in high school is worth a lot less when you can take a selfie every other day.
I don't see it as a negative per se, the thing is most people won't have the decency to keep all that shit for themselves and, say, share just the best 1% they produce. They will flood their social networks and the rest of us will have to sweep through the crap for our daily dose of internet memes.