To you it might seem trivial to use AI to make your picture into a video, but that video is literally a slap in the face to everyone who has worked to be able to animate, film, and edit videos themselves. The AI can only do it by consuming vast amounts of similar content, all of which was made with human work-hours, and wasn't published with the intention of being put through a pattern recognition meatgrinder just for your convenience.
It isn't illegal for you to use generative AI, you're welcome to post it on your own website or on platforms that allow it. But I think it is deeply ironic that you would complain about the places that do allow AI turning into slop-fests. What did you expect to happen? How would you create an "in between"? Tell people that they can just use it a little bit? That is unrealistic, there's just no practical way to enforce it. If AI is allowed, it is likely to be fully allowed, and then you will experience the race-to-the-bottom economy it creates. In that world, there is a direct incentive to let the AI produce as much as possible, because that makes it fast fast fast, and volume is what matters most. Choosing to generate only 50% of your work just means you are 50% behind.
Here, AI content is allowed but is supposed to be flagged, and the majority of people who come here are serious about supporting humans, not machines, and thus are going to be very cautious and discerning on the whole. So, from my perspective, AI hate is the only thing keeping this space sane.