AI isn't trying to sell to you: a precise artist with real vision in your brain. It is selling to managers who want to shit out something in an evening that approximates anything, that writes ads that no one wants to see anyway, that produces surface level examples of how you can pay employees less because "their job is so easy"
You seem to speak from experience of being that manager... I'm not going to ask what you shit out in your evenings.
Yes and the thing is, even for those tasks, it's incredibly difficult to achieve even the low bar that a typical advertising manager expects. Try it yourself for any real world task and you will see.