Right, but you're thinking as someone who has a vision for the image/video. Think from someone who is needing an image/video and would normally hire a creative person for it, they might be able to get away with AI instead.

The same "prompt" they'd give the creative person they hired... Say, "I want an ad for my burgers that make it look really good, I'm thinking Christmas vibes, it should emphasize our high quality meat, make it cheerful, and remember to hint at our brand where we always have smiling cows."

Now that creative person would go make you that advert. You might check it, give a little feedback for some minor tweaks, and at some point, take what you got.

You can do the same here. The difference right now is that it'll output a lot of junk that a creative person would have never dared show you, so that initial quality filtering is missing. But on the flip side, it costs you a lot less, can generate like 100 of them quickly, and you just pick one that seems good enough.