It’s so difficult to know the boundaries. People from older generations giving advice about screen time and stuff simply don’t understand… “screen time” for me growing up was broadcast tv and a limited set of video games. If you didnt like what was on tv, too bad. Do something else. If you were bored of whatever Nintendo game you had… too bad, do something else. But now… you can get literally anything. Plus the iPad gets used to make videos of playing with the cat, or she will have tea parties with her stuffies and make them tea using some weird cooking game. Etc.
No previous generation had to face this. It’s an order of magnitude or more shifted from when they raised us. Tablets basically can replace almost every single toy from growing up besides ones that require being physical (rc cars, bricks, digging in the yard)… but books, cameras, light brights, etc… all replaced.
It’s completely uncharted water us parents are facing. Anybody that claims to “know the right rules” for tablets and technology is lying to you. They don’t. Nobody does. All we can do is use our best judgement and try to give ourselves credit for doing the best we can.
Good thing with analogue toys like legos is you know your kid is playing with legos that is wiring X brain cells for Y skills, even if Y skills are deprecated in digital world. It's hard to say with current gen, there's screen time to try to shape behavior, there are occasional kids who are tech literate maestros which every generation has, but plenty of kids who rely on LLMs, can only finger type because they grew up with touch screens. We're in tech timeline where passive users, i.e. most kids are impressed by millennials who can write cursive and touch type, other kids build stuff that previously required teams of 100s of engineers.
And the kids you mention can barely understand files, filesystems and don't even mention them about O(n) notation. If any, these kids doing the jobs of 1000s of engineers are proportionally worse than the average secretary skills in the 80's.