Dude, you weren't inspired with your "art".
You stole it.
AI Art is theft, period.
ANd if you're talking about "going against moratlity" think about the environmental impact that a single AI server makes. The carbon emissions alone are ridiculous.
Now, let's talk about your examples given.
Dragon Ball. Yes, it's inspired heavily from Chinese Folklore, but the characters are drown entirely from nothing. The designs of the characters within were loosely inspired by Sun Wu-kong with references to Jackie Chan. But Toriyama-San brought the character to life entirely of his own hand, and frankly for you to seemingly compare yourself to a genuine genius and massively influential person like Toriyama-san is incredibly telling.
Disney Films. Yeah, the stories themselves were based either around myth, regional folklore or previously existing works of art (i.e. Lion King is just Hamlet with less inc*st) But the designs of Simba, Scar, Mufasa, Beast, Cruella DeVil, Minister Frollo, Jafar and so many others were from artists who poured passion, time and love into their work. In some cases, when using pre-existing material didn't entirely exist outside of *very* old "ideas" of what some things looked like, they were created by pure imagination. Look at Phil, in Hercules. There were 27 different designs during production and part of those were imagining Danny DeVito as the character while in the booth recording lines and a similar mindset was used for Hades, which was influenced by sketches *made from nothing* and James Wood's mannerisms in the recording booth.
Anyone can make art and neither of us are telling you that you cannot make art. But AI "art" is nothing more than theft of ideas. It takes the soul and the love and the life out of the end product and leaves it nothing more than a easily identifiable imitation of someone else's work.
Put the work in, mate. Make the assets yourself or hire someone to do so and your product will improve dramatically AND your audience will be able to tell that you genuinely care not only for your product but for the time of the player audience.