It's an interesting one. In a way they are right.
I grew up in the space between low tech and hi-tech.
Didn't have a tv till I was 7 or 8, didn't have a phone in the house till I was 12

Still hate phones.
Love email.

But we did have the very first video games console to go with the telly :-)

But that was then - you couldn't do it these days and expect them to be able to fully integrate with their peers.
Rather than giving their kids a better start in life, it's handicapping them for the soceity we actually live in.
So yeah, limit the technology available - I certainly wouldn;t give smartphones to anyone under 10. But to not have access to computers in school is just daft.