"What are you doing with that time if everything is just done by A.I?" Ah, this is explored, in a way, by HG Wells; aren't the Eloi just humans that have become intolerably and insurmountably indolent because the Morlocks do everything for them? I think we can easily extrapolate AI as the Morlocks and humans as the pointless Eloi. But that begs another question: how long before (as explored in other popular fiction) the AI becomes sentient and decides to come up out of its holes to overcome the lazy human race? It's simple question you pose, but one with a lot of ramifications.
"...A.I. so you don’t have to learn." This strikes deeply into my heart. I work in the natural gas industry, where hands-on is a must. Yet even
we are looking at ways to automate and AI-tomate our administrative workflows. Recently, a friend of mine in the IT department asked me: "Why don't you just ask AI how to do that? It's taking you forever to figure it out." AUGH! I was aghast. If AI short-circuits and dies, what would I do then if I never actually learned the thing I was doing myself? Another analogy—We taught our kids to drive using a manual transmission. We had cars with automatic transmissions; but we made them learn the hard way, first, before they were allowed to use the easy way. Because there will probably be a time that a manual transmission is
all that's available! When AI is not available, what will we do, what will our children do, if we have never truly learned to do that for which we rely on AI?
"I create." "I think, therefore I am." Are the two statements really so different? I would say they are
identical. I would further submit, in support of your essay, that AI does not think, and therefore it is not a replacement for humankind. Taking a religious cant, just for fun, we also read in the Bible that the devil is unable to create, that he is only able to distort that which has already been created into a mockery of its true form. Well, the opinion on the table is that AI is bad for humans; but we can extrapolate again that it is also bad for the
soul, that we are surrounding ourselves with the devil's distorted works! (Mind you, I'm not religious; I'm just chasing the argument down one more road of validation.)
"Just a mess of stolen hard work and stories." This is an interesting point, because it may not actually support your proposal. It has been observed by many great minds that there is nothing truly original left in the world. Everything man creates is a combination of many other things earlier men have already created. For example, I have read that only 7 storylines actually exist, and that every story is a nested loop or combination of these storylines. Nothing original, nothing created: just rearranged building blocks of those things that came into being just after Homo Habilus became Homo Sapiens. It's not a comfortable thought, but AI might have actually learned its skill of mimicry-vs-creation from us humans.
"Not just for the environmental impact, but simply for the fact it makes the world less human." For one thing, I'm skeptical there is a negative environmental impact from AI. In any case, you don't really expound on that in this essay, so it may not be something you want in your conclusion. Beyond that, we get into a paradoxical discussion about AI vs human ingenuity. Human curiosity would be bound to invent AI; to prevent or preclude that would be to limit and interfere with that which you mention holding so dear: creativity and creation. Yet AI brings about a stupefaction and dulling of the creative process. Yet
again, minds like yours, not dulled or stunted, rail against the negative side effects of AI. And yet one
more iteration in the cycle, your own creations, be they words or art, might be a detriment to certain
other humans, triggering them inadvertently to some dark consequence. Like the atomic bomb and serin gas, AI was likely an inevitable invention{emdash for better and for worse— in any human timeline one can imagine.

You have a lot of fragments in this essay. I would encourage you to revisit the paragraphs and look for these fragments with the fact in mind that this
is an essay. Some readers might expect a valid argument such as yours to be stated with better grammatical structure.

Your thesis becomes clear, but it's a little muddled in the beginning. I once got some simple and incredibly helpful advice from a mentor 30+ years ago with regard to essays, presentations, sales pitches, etc:
Tell 'em what you're gonna tell 'em
Tell 'em
Tell 'em what you told 'em
A problem, as I see it, is that you get a little ahead, in your introductory paragraph, and start to make some of your points rather than just introducing them. You're
"telling them" before
"telling them what you're gonna tell them." In this reader's opinion, from
"We have all seen..." to
"That's not what scares me." should be omitted from that first paragraph.

"Tie-out." I think there is room for your concluding paragraph to more closely reiterate your thesis, with that last sentence
definitively reinforcing it.