This is an important observation. We've had 50 years of personal computing, but is there any evidence that computers in any form ever improved the academic performance of students?
AI certainly seems to be making students much less competent.
Why would a technology that makes the mind work less, have benefits for a process, that works by making the mind work hard?
You still need to calculate calculus yourself long after you could buy books where the result is written in. That supposed "paradoxon" is not even specific to electronic tools. It's just that the point of education has never been to get results, but to exercise in as much as side paths as possible and memorable while following the path to the results. The result mostly get thrown away immediately.
I gave my son CRPGs for his GBA that required reading what the characters were saying. His reaction to finding out his three and four year old friends didn't read was interesting.
No, we know that when technology (particularly: Internet connected laptops) is introduced into classrooms competency declines. This has been shown to be true internationally