The article doesn't say there has been any peer-reviewed research to show a little screen time is harmful. It just says, oh, check it out, here is a grab bag of assholes, we picked out of a population of like 1 Million engineers, and THEY DONT LET THEIR KIDS USE SCREENS.
Well guess what. I was a video game engineer for 10 years. Now I work in a different area of tech. My wife works for a giant tech company too. We let our 2 year old watch cartoons on Netflix on Sunday mornings. She loves it. We think its cute, because we used to watch Sunday morning cartoons as kids ourselves. She's one of the most advanced kids in her daycare. She can recite the alphabet, count to ten, and speaks full sentences, and tells stories in class. The teachers say she is doing really well.
Whoopity doooo. So what if she knows how to use an iPad.
Please. Stop treating Facebook engineers like they are special snowflakes that know about everything because they wrote some javascript and html that runs a social networking website.