Back in the 50/60s we also thought duck and cover would work when the Reds attaked us with the h bomb.
Times change, knowledge is gained, and science backs up said knowledge. At the least, lets evolve and not act like cave men. Well... Actually cave men spent lots of time with this "tribe" when not hunting or protecting their territory or tribe.
It appears every country who gives more time of fairs better in just about every aspect of education, teenage pregnancy, and just in general adolescent crime. It easy to link parents being around to those statistics.
You og' that had kids years ago didn't have to deal with raising them in this world of cell phones, Facebook and all these other external things pulling at your child to corrupt them.