Sure we could use our brain power with old techniques to do these, but why? I don't want to do any of these. I'd rather use that brain power for other problems.
Same with maps.
I don't want to have to store a bunch of location or routing data in my head.
I think what you're pointing towards is going from having problems to solve to not having any problems to solve.
That's definitely a danger, but right now is still early in the AI era so obviously it'll feel like we went from solving problems to letting the new tool solve them for us.
There are still many problems to solve.