Individual screens can be isolating, they can also be somewhat social. I agree, not a complete replacement for other social activities for sure. But, as a kid with internet connected videogames growing up, those internet connected games kept me playing with friends from school and other groups even if we weren't able to physically get together that evening.

Meanwhile, my brother would often go dig in and read a fiction book in isolation. Which is fine and great and all. I'm definitely not taking a dig at reading a book in any way. But, its not like only screens lead to isolation. There's plenty of tasks one can do at home that then become isolating.