Although a hammer is a useful tool, it's obviously not that advanced of a tool.
As soon as you have an 'advanced' tool that can automate things or do things for you better/faster/with less efforts, you don't need to learn that skill anymore, why would you ?
It doesn't mean the capacity is lost forever and the skill can't be learned anymore, but it's gonna be less and less frequent at the population level.
Nowadays, how many people can:
- make fire without a match or a lighter ?
- add large numbers or do math operations without a calculator ?
- reach a destination without a gps ?
- learn history dates, lists of cities / states / etc...
In the end, it's a bit similar to how species evolve. When a function isn't needed anymore, the organism tends to evolve without it.