Well, at the time they merely replaced those skills with learning how to drive a car.
But, in a future where you won't have to replace previous skills with anything (e.g self driving cars, calculator vs having to know basic math in your head etc) it can be argued that it can lead into a general dumbness.
Some people will say that it will "free resources for higher level learning" etc, but in all probabillity it will just infantilize most people, a la "Brave New World". We already have huge resources for higher level learning and most people just spend their time watching 3 hours TV and day and learning celebrity gossip on the internet.
>If anything, based on what I have seen, the next generation will be shockingly smarter, more adept at fact-checking, much better at focusing and multi-tasking, much more disillusioned about institutionalized education and much more interested in self-directed learning
A few perhaps. For the majority it will be the same ever increasing dumbness that has been going on for decades.