You feel like there is... But the minute you try to bring it into creation, you find out just how absurdly fuzzy it really is. A non-artist might believe that the failure of bringing your mind image to life is a failure of _skill_. That you are just physically incapable of accurately reproducing the thing you're picturing in your head.
While that might well be a factor, it's never the whole story.
That's most clear with writing. Anyone who's ever written anything of substance has had the experience of having what feels like a pretty solid story/thesis/whatever. But the minute you try actually writing, you realize just how fuzzy that idea really was. You have to work and labor at it to make it become something coherent. It's not a limitation in mechanical skill: typing absolute non-sense is exactly the same difficulty as typing the a NYT best seller. The difficulty is in the deciding what to type.
A huge portion of art is in that part of the process. Exploring ways to bring into existence not _the image you had in your mind_, because there's no such thing. But to bring into existence something that makes you _feel_ the same way the fuzzy idea in your head made you feel.
And that's the thing that AI does not, and fundamentally cannot, give you. All the innumerable micro choices your mind does as you try to gradient descend that raw log of wood into the carving of a bear.
Looking at an AI output and deciding whether it happens to match the fuzzy idea you had enough or not, simply isn't the same thing. I'm not even saying that it's not valuable or useful, it certainly can be. But it's fundamentally not _art_. That's the reason Rick Rubin, for all the praise he (deservedly!) gets for all his work, does not describe himself an _artist_. It's just not the thing he is doing. He doesn't create, he evaluates. And if you take that for what it is, that's absolutely fine, great even, when you're as good as he is.
But if you believe the evaluating is, as you put, "seeing what's in your mind's eye at the highest fidelity possible", that's simply untrue. And it _cannot_ be true, because there isn't actually a thing that's in your mind's eye in a way that would allow for that, regardless of whether you're using AI or creating it by hand. Using AI just gives you the illusion that there ever was such a thing.