I don't think technology can be blamed for the shift in family time you mentioned. It's still a parents' role to structure the environment they want their children raised in, and a parents' responsibility to ensure their children adhere to the guidelines set forth.

I often hear people complaining about how much time their kids spend watching youtube or playing video games, but the reality often is they just don't want to make the effort to redirect. It's easier to complain about perceived obstacles than it is to roll up your sleeves and do the work.