I wrote a big long post and then deleted it.
All I'll say is this: I suspect that your vision of How Things Used to Be, which I derive from your negative attitude about How Things Are, is largely nostalgia mixed with an assumption that your childhood experiences were far more broadly shared than they actually were. I spent my childhood in imaginative play, reading non fiction, etc, etc. Of course I also spent it playing games with rules and reading comic books from other countries, but that's beside the point. Anyways, I may have spent my childhood doing all the things you mentioned, but you know what? I was weird. Most people didn't do what I did, didn't grow up like that, and I suspect that when you were a kid it was no different. I'm sure your city now has a similar proportion of huge nerds like me as it did in the past, and I'm sure that percentage is low enough that you really shouldn't expect to encounter lots of them on a random sample in a bookstore on a Saturday afternoon.
That's about all I can write without turning this into a diatribe against old people and anyone who writes a "kids these days" essay. They're reductive, usually vaguely insulting, and typically speak much more about the author and the lens through which he views the world than about the alleged subject matter.