If a human is trained by AI slop and then they make something with their own hands, is it still art?

This question has been rolling around in my mind for awhile, and there are a few parts to this question. I will need to step through of how I got to these questions.

I have used AI as a tool in my own art pieces before. For example, I have taken a painting I had made more than a decade ago, and used a locally hosted AI to enhance it. The content of the final image is still my original concept, just enhanced with additional details and also make it into a 32:9 ultrawide wallpaper for my monitor.

From that enhanced image, I sent it through my local AI again (different workflow) to generate a depth map, and a normal map. I also separated the foreground, midground, and background.

Then I took all of that and loaded it into Wallpaper Engine (if you don't know what that is, it's an application that can be used to create animated wallpapers). I compiled each of the images proceeded to manually animate, track, and script it to bring the entire thing to life. The end product is something I really enjoy and I even published it on the wallpaper engine steam workshop for others to enjoy as well.

However, with all the AI slop that is being generated endlessly and the stigma that AI has in the art community as a whole, it brought the following questions to mind:

1. Is the piece that I painted and then used AI to rework, and then manually reworked further, still my art?
2. One step further, I didn't build any of the tools to make the original painting, I didn't create the programming or scripting languages. I didn't fabricate the PCBs or chipsets that I built my computer with to run all of those tools. The list can go on and on for how many things I use that were not created/generated by me nor would it be possible/feasible to give credit to every single person involved. So, is any artwork that I make actually mine? Or does it belong to the innumerable shoulders of giants of which we all stand upon?
3. Those questions led me to the main question of this post. Say that a real human grew up with only the experience of seeing AI slop and, as such, can only reference that AI slop experience they had learned; if that human creates something with their own hands, is that piece they create still art? Is it even a piece that they can claim they made?

I'm curious to see what thoughts people have on this.