You also have to consider a ( I would argue large ) percentage of those evangelists are simply lying for financial gain. They see profit, or at least reduced costs, and quite simply don't give a shit about customer experience or anything like that.
I think there’s a lot of that dream — note how many of them became AI experts after striking out in cryptocurrency — but also a huge undercurrent of desperation. The rich guys who run most of the economy have made it clear that they want mass layoffs and that LLMs are the tool they’ll use to get there, so these guys are hoping that if they get on board early enough they’ll be the people doing it to everyone else rather than the targets. I’m not sure how successful that’ll be but it’s somewhat understandable how people might find themselves thinking that’s the best option available in the current economy.