And what if he had Fortnite etc back then? Would he have really excelled at computer work? Maybe.
My early family life resembled the parent's. The difference in my case and related to your point wasn't the absence of distractions it was to get at them I had to learn how to make the damn computer work. I once tricked my 286 into thinking it was a 386 so that I could install Windows 3.1. All for the purpose of... playing solitaire. Yeah, that's how bored I was.
I'm not even sure I could replicate doing that today. As a 9 year old I was better with a rudimentary BIOS than I am today with a modern one. I'm pretty sure it was because there was a barrier between me and what I wanted and the only way to get it was to figure out that horrendous system.