I don't think kids today are dumb. Both of my kids have active social lives. My eldest kid have some of her college friends staying at our house for the weekend. My youngest kid is active in after-school extracurricular activities such as choir and track (running outside) as well as doing piano recitals. My eldest kid is far more aware of her health than many people of the older generations. I like to think I played the part of a good role model to her.
If anything, they know how to multitask better than us older folks. It's true the smartphone and video games are much too prevalent among the current generation. But, to my kids, they are an addition to their activities, not a replacement.
Before we start criticizing the younger generation, we should first look at ourselves in the mirror. Does that person staring back at me look fit instead of fat and disgusting and takes a lot of medication because that person never took care of himself while he was younger?