He seems to ignore the fact that computers and be used for other stuff than gaming, and that gaming or DIY/tinkering may result in people starting with that other stuff.
I wouldn't be surprised to find that arsenic has some beneficial medical properties. I won't, however, be adding it to my morning coffee.
I found it surprising that people had these concerns about radio and tv in the past, just as we today have about computers and cellphones, etc - eg: just watch parents with their kids and tablets.
Umm, am I misreading your sentence? Because the 1985 me would like to discuss the finer points of Atari's Star Raiders that I had on my Atari 800. Oh, you mean professional computers used for professional stuff like accounting? Yeah, those ran things like Spacewar! just fine. But again, I probably missed something in what you're trying to say.
I found it surprising that people had these concerns about radio and tv in the past
TV was first described as a "vast wasteland" over 50 years ago (https://en.wikipedia.org/wiki/Newton_N._Minow). One could say that "they" will always have something negative to say about technology. OTOH, turns out "they" are often right to a large degree. For every Sesame Street are at least a half dozen reality shows.