My nuanced take on the whole generative AI used in filmmaking debate is that its done for one of several reasons:
1) They are control freaks and don't like the collaborative process. I met a guy in college who did his entire thesis with AI simply because he thought everyone else was "too ego starved" and would try to change his idea too much.
2) It's faster and requires less effort and creativity, like you said. Corporate initiatives have deadlines, and AI removes the need for brainstorming or coming up with ideas, so its faster overall. Additionally, AI is trained to do things in the most palatable way possible: so it's great at avoiding alienating people.
3) People see it as a viable option for cost-cutting and consistency. An AI can't revolt or anything like that, so having it pump out a dozen cartoons in the time it takes the average person to do a minute of animation is good, never mind that you don't need to pay nearly as much as a salaried employee. I get the argument that, for ametures, it can help bridge the gap between skill and vision, but I've always found that its better to learn how to do something well by starting out really shitty at it.
It'd be stupid to dismiss everyone using GenAI as "dumb techbros". Coca Cola is using it for their advertising now, and I figure in like 5-10 years it'll be sort of in a similar situation as the Paul brothers are seen now: yes, most rational people find them to be moronic douchebags, but some brands still use them to advertise their stuff and there are a surprising amount of people I've seen online who defend them vehemently. AI is like that to me, in that most people will still hate it in the future, but there are companies who will continue to use it.
Me personally, I'd rather see it used for more blue collar-type jobs: like having it explain how to fix things around the house yourself rather than paying someone to do it for you, diagnosing mechanical problems with your car to save the mechanics time diagnosing problems (or so you can do it yourself), and maybe have it curate a personalized list of news stories for you in the morning. In such a way, it just streamlines normal work processes rather than replacing jobs entirely.