Why? Who needs this? Who wants this? I still don't get why you would produce art with generation models instead of letting human artists do their thing. It's only funny as long as it's bad, but once it becomes better it's just creepy and most of all totally pointless.
People that don't like East Asian monopoly of anime style contents. Manga and anime style contents are sold at completely broken price/performance ratio while it continues to invasively permeate into cultures globally.
There are increasingly more reports of foreign scalpers stocking couples of $5 doujinshi in weekend cons and demanding receipts, and authors are moving to block them. That's like mafias genuinely smuggling charity home baked cookies. It shouldn't make sense. This astronomical gap in supply and demand, alone, should be enough to create incentives for people to even just mess up and ruin the market.
Why is it pointless? People want anime. This technology allows more anime to exist. It's like you're saying "why do we need cast-iron moulds? Just let artisans do their craft."