I'll use myself as an example:
I grew up with parents who restricted my time spent on video games and internet use (I just spent more time playing video games at friends' houses). They did however allow me to have computers in my room that weren't connected to the internet.
I spent a lot of my early teens tinkering with my computers and learning to code. When I was around 15, I finally saved up enough money from my summer jobs to buy an iMac (and a wifi router that I convinced my parents to let me replace theirs with). I then had unlimited internet access and continued to learn IT and programming.
A few months after graduating high school, I moved cities and applied for a dev internship at a local ad agency. I had started at a community college but dropped out to accept a full-time position. Now four years later, I've held 2 lead positions at two companies and am earning a senior-level salary.
Without a doubt, I wouldn't have had that level of opportunity if I wasn't allowed to have computers growing up. I think parents are doing their kids a potential disservice by placing all forms of 'screen time' in the same category. Restricting (leisure) internet use and video games is very understandable, but I think there is real value in allowing kids 'screen time' if they have any level of interest in technology.
Edit: Unwittingly.
Restricting "screen time" is the simplest way to reduce access to the harmful things in that list, at the cost of also filtering the nice stuff. A more sophisticated approach is probably to control which apps kids have access to and for how long, but that's a lot harder to pull off effectively.