Wow, more fodder for the paranoid
The author and subject of the first page interview makes many assertions, but doesn't give any actual data to back this up. He's not even a scientist - he's an activist. I recall hearing the exact same arguments when video game systems came out, then computer games.
Children adapt to their environment. I can asset, from personal observation, that it seems many parents are glad to let the kids play with tablets and phones to keep them quiet. However, I don't know that this is causing "social isolation" - this is just the way they play now. Back in the 60s and 70s, kids would play with their toys in their bedroom, now they play on tablets. What's the difference? The eeeeeevil electronics! I don't think there is any more or less intereaction among kids than there has been in the past. If anything, there is more intereaction due to social media.
As for all these other things, there is usually some misinterpretation of so called "scientific" data that asserts things such as "sitting is bad for you" - give it 10 years and another study will come out that says "standing is killing you". Most of these make great fodder for "journalists" because they don't really have to investigate the source - if it is a scientific paper, for example, it is assumed to be credible. For years, they said eggs will kill you - now they are good. Red meat was going to make you die sooner - now it is great. Exercise will make you thinner - now it's more aobut genetics and exercise really doesn't make you lose weight. Always remember to look for the motiviation - either they are getting grant money to make a point or they are doing it for personal reasons and they are backed by some university that gets richer every year.
We don't have any truly objective scientists anymore. Don't freak out about articles, especially online ones. Just live life and enjoy the journey.