Right, it was due to the way of bringing up a child by family before. Yet, today I think it is mostly due to the social media and peer influence among them. An unsatisfied generation has been created by some uncapable parents. Also, stupid and dangerious behaviours have been normalized by social media, such as beating someone and recording it.
This is part of it. But these tools have come about for a reason, driven by business profits. All reports say screens are bad for kids - yet the corporations keep producing content designed to keep them using screens, right?