I don't think that's true. Human intelligence is limited, and our brains are inefficient machines.

The tools we built to replace muscles have mostly obsoleted raw strength for tasks like excavating earth.

There's no reason to think we can't do the same for brains. And then we'll never need to think for a living again. Some people may want to do it as a commercially insignificant hobby, of course, the way people lift and compete in strongman competitions today.

We'll have AI taking care of our needs, the way a good mother takes care of their children.

A good mother doesn't raise children to be dependent upon her for all their needs.

For this to actually work in a way that benefits our species, humans will need to become something else/next through their interaction with the technology.

>our brains are inefficient machines

The human brain is exceptionally efficient.