For all I care your site isn't required to be commercially viable. If you aren't able to convince the customer and instead opt for so-called cooky-terror banners as a dark pattern with the primary goal of de-sensitive-izing users, you don't deserve my cooky. Opt-in means legislation has passed this view into law, with the quirk that the dark-pattern is fully expected because the industry needs a sort of legitimization for the use of private data. Small companies usually suffer under compliance, no doubt.
Besides, what has this to do with AI prompts? No doubt they want to analyse every single interaction as a sort of supervised training for free. This does not rely on third party cookies, but it might benefit from making identifications which somebody could argue are not essential to the service as advertised.
Is that the kind of tooling that site operators have grown to find indispensable over the last couple of decades, that you mention?