You could have displayed someone’s already existing art and credited them with a link to their social profile, though.
No, because that's boring and not creative.
You do realize you're stating that in defense of generic, machine-generated imagery, right?
I do automation for a living, I'm well aware that computer engineering can be a creative process, but it is not an artistic one.
I don't like seeing visual art automated.
I don't know what's in your computer, but some high-end graphics cards can pull more than 300W at full load all on their own. 400W total power output seems a pretty conservative estimate to me.