Earlier quoted context omitted.
Even teachers use Whatsapp to communicate with pupils nowadays. Here in Finland, from 13 and up, it's pretty much total social exclusion and severely reduced ability to participate in school work if you don't have a smartphone. Teenagers without phones is pretty much uneard of, apart from in some religious circles. The thing about those teenagers is that they rarely meet outside school. Covid made damn sure parents a…
If a teacher could not figure out how to communicate with a kid without routing those communications through Facebook servers, I would kindly teach them how e-mail, matrix, or other neutral internet protocols work. Honestly -most- of the time I tell people I don't have a phone they say something like "That is super cool, I wish I could do that. My phone has ruined my life. How would you prefer we keep in touch since…
I get the feeling that your worldview is extremely limited, and you have not experienced the world of kids.
We choose schools based on how successful their graduates are. The more CEOs, doctors, etc that a school produced means that that school is more successful.
Once the school is chosen, you adhere to their rules. For my kids, some of those rules included online-only stuff. Sure, I could send my kids to a shittier school, but I don't want to do that.