This is quite frankly utter bullshit unless there is a lack of parenting going on i.e. you brought your kids up to be judgy assholes.

My kids and their friends have a right mix of all sorts of phones. They don't even talk about it. They just work out how to deal with it. Mostly that results in them picking a common platform, usually Discord or Snapchat and using that.

This is not a technology issue!