Somehow, I doubt the Venn Diagram of parents with the time, resources and energy to move their kids off technology without hurting their education versus those with the time, resources and energy to get their kids their own laptops is much less round and overlapping than a singular circle. In otherwords, the exceptions on either end are just that, tiny little slivers, and neither close to anything like "the majority".
You're half-right that the OS can seem irrelavent, but suggesting Linux is far less extreme than suggesting the removal of tech entirely.
These kids would rather have Steam-decks, AKA, capable general-purpose computers. They would probably learn more from owning them, and yes, being forced to take regular analog breaks from their use. Steam-decks run Linux, btw...
... but no, an educational, social, play and extra-curricular world defined entirely by parents' biases is obviously best, the one thing we should all agree on.
No seriously, stay away from my kids. Their hand-writing is probably better than yours.