It’s definitely actively bad to involve a device in the vast majority of education. And, it’s a purely selfish thing by tech companies to insert themselves into education.

A student should not see a computer until college or vocational school unless they are taking e.g a high school programming or electronics class.

Now that's just needlessly extreme in the other direction. Students will be seeing devices much earlier than that just because their peers will use them so it makes sense to educate them on their proper use and dangers much earlier than college. It just doesn't make sense to cram them into every subject because not using one is outdated.