Because humans learn and innovate. We take things we see, get ideas from them, and then alter then according to their own, very different personalities.
AI grabs stuff and sticks it together, but because it's not actually sapient, it doesn't
create.
This is an interesting point. The farmers certainly were, but were the laborers in the fields who lost their jobs? What about the wash women? Of course, now we often wash out clothes after a single day of wearing them, not a few months.
This completely ignores how the actual Luddite movement was about replacing skilled laborers and paying the new hires sub-par wages. Which is exactly the same problem that AI is causing.
I don't know, how much of your words are original and not re-hashing of what someone else wrote at another time and place? Our words and thoughts might be original in that I have not said them in this form before, but it is unlikely they are unique and have not been said in near identical fashion by someone sonewhere at some time in the past.
So? That's still completely different from a non-sentient machine.
Look at this example.
This is a video of a starling that has learned how to talk and, possibly more importantly because this forum is full of nerds, make R2-D2 sounds.

But it has no idea what it's saying. It's repeating things it's heard. It can't put new ideas together. Starlings are smart, but not sapient like humans are.
AI isn't even as smart as a very dumb bird. It's not sentient, let alone sapient.
Even if you quote someone else directly, you're going to be putting your own spin on the words--the phrasing, the tone, the cadence. It's why we like actors who can act, not just repeat what's in the script.
Why should I want to learn and improve upon a skill I don't want to learn? There are many things I can spend my time on. Why would I want to learn a skill that may well be mostly obsolete in a few years?
You think creativity is going to be obsolete? Seriously? Are you even a gamer, when gaming is all about being creative?
But I don't.
Ok, but why would I want to spend my time doing that?
Do you see the re-occurring issue here? Yes their is an idealist altruistic value in learning an artistic skill. But their has to be worth or value in doing so to the person investing their time to learn that skill. Do you understand that many people don't want to make that investment? Especially when their are tools they can get something good enough?
Sure, but why should your standards be forced upon everyone? Maybe some folks are happy with a $0.99 taco that's ready in 2 minutes and not one for $14.99 that take s45 minutes to come to your table.
Because "don't take things from other people without their permission" is the kind of basic, kindergarten-level standards that everyone should meet. That's like the lowest bar necessary to be part of a society.
And in case you've forgotten, that piece of "art" that the AI spat out for you was literally made by stealing other people's IP.
You don't have to learn how to draw. You can hire someone or you can use some of the many,
many pieces of public domain art that's out there. Why steal when you can get what you want for free?