I think we can make an analogy with our own brains, which have evolutionary older parts (limbic system) and evolutionary younger parts (neocortex). Now AI, I think it will be our new neocortex, another layer to our brain. And you can see limbic system didn't "outsource" thinking to neocortex - it's still doing it; but it can take (mostly good) advice from it.

Applying this analogy to human relationships - neocortex allowed us to be more social. Social communication with limbic system was mostly "you smell like a member of our species and I want to have sex with you". So having neocortex expanded our social skills to having friends etc.

I think AI will have a similar effect. It will allow us to individually communicate with large amount of other people (millions). But it will be a different relationship than what we today call "personal communication", face to face, driven by our neocortex. It will be as incomprehensible for our neocortex as our language is incomprehensible for the limbic system.