I also think that what intelligence I or anyone else has is imperfect and therefore “of limited utility”, but this doesn’t mean that our intelligence wouldn’t be “necessary” for a very large number of tasks, or even that it wouldn’t be “the ultimate tool” for most of those tasks.
So I don’t see at all what would be the contradiction you’re referring to.
If you believe that, then your earlier estimate of “necessary” was very far off-target.
I also think that what intelligence I or anyone else has is imperfect and therefore “of limited utility”, but this doesn’t mean that our intelligence wouldn’t be “necessary” for a very large number of tasks, or even that it wouldn’t be “the ultimate tool” for most of those tasks.
So I don’t see at all what would be the contradiction you’re referring to.