"Professional looking" is a moving window, has been for a long time.

Right now, looking like an AI did it (even if it was actually a human) is a sign of being un-professional. To a limited degree, one can prompt an AI better and get something that doesn't look as cliché as the default settings, but even then there's often someone who can spot a tell. "You can fool all of the people some of the time, some of the people all of the time, but not all of the people all of the time" applies here.

Art is at least two different things, for at least two different groups: nice to look at etc. is one of them; the human equivalent of a peacock's tail (i.e. the effort is the point and cheating is worse than having nothing) is the other.

Still enables people to do more. Just like Microsoft Word and and a printer / photocopier allowed small scale kinda-nicely-typset amateur magazines / news publications in schools or small local or hobby communities, but it didn't quite rise to the level of professional publishing and typesetting of actual prestige magazines and papers. But that didn't matter, because both relative prestige and practical value are real things.

Making frozen pizza doesn't get close to eating pizza at an authentic Italian restaurant, but frozen pizza is still pretty good. So if someone says "introducing frozen pizzas will enable anyone to eat a good pizza at home, no need to go to a restaurant" then it's a half truth. The true restaurant experience will still have its role, but the frozen product is still pretty good compared to not having that option at all. But your friends will not be at awe at your culinary skills if you make frozen pizza. But they'll still likely eat it and appreciate it when hungry and chilling at your house.

I think there will always be a market for human-made things, but this comes with a premium and not everyone can afford it.