For a counterexampel, my personal experience is pretty different. I had read almost every one[1] of Asimov's novels and short stories by the time Deathly Hallows came out when I was 16, and I was still a big enough fan of Harry Potter to finish each book the day it came out.
To this day i'm pretty confident I could pick up a Harry Potter book and enjoy it. There are different types of storytelling, and not every kind has to have balanced stakes or world-building that stands up to scrutiny. And it's not like Asimov's work doesn't have similar flaws: as much as I love the scope of the Foundation series, it does settle into a bit of a pattern of setting up seemingly insurmountable challenges and then resolving them through neat changes to the rules of engagement of psychohistory (though as a much more ambitious series than HP, it's more understandable).
To this day i'm pretty confident I could pick up a Harry Potter book and enjoy it. There are different types of storytelling, and not every kind has to have balanced stakes or world-building that stands up to scrutiny. And it's not like Asimov's work doesn't have similar flaws: as much as I love the scope of the Foundation series, it does settle into a bit of a pattern of setting up seemingly insurmountable challenges and then resolving them through neat changes to the rules of engagement of psychohistory (though as a much more ambitious series than HP, it's more understandable).
[1] Literally; I was ravenous