There absolutely is a market - anti-AI sentiment among creatives isn't going away. Like any other "purity" branding, it's a real commitment and severely limits your future ability to pivot.

I don't know of anyone in the VC or traditional incubator communities who has an appetite for this. And the groups who are an ideological fit don't have the funds to be worth pursuing.

It's a niche. Like most niches, there's the opportunity to prosper, but yeah - bootstrapping (or angel-bootstrapping if you're lucky and have a personal connection) is pretty much the only way to go here.