there's something's highly suspect about someone not understanding the difference between art made by a human being and some output spit out by a dumb pixel mixer. huge red flag imo.
and yes, the value does go. because we care about origin and intent. that's the whole point.
if the original Mona Lisa were to be sold for millions of dollars, and then someone reveals that it was not the original Mona Lisa but a replica made last week by some dude... do you think the buyer would just go "eh it looks close enough"? no they would sue the fuck out of the seller and guess what, the painting would not be worth millions anymore. it's the same painting. the value is changed. ART IS NOT A PRODUCT.