The interesting thing, to me, is that you can't look at those 10-year-olds in isolation. My experience mirrors yours and, yet, if you look back further, I'll bet you find that those 10-year-old tinkerers almost all have some history with Legos or other such construction toy that, very early, started building the guess-fail-iterate problem solving model that I believe is so important to computer aptitude.
One of the side effects to being "good with computers" is that you end up getting asked to do a lot of tech support. Over the years, I've seen so many people who are so afraid of doing something wrong that they can't figure out how to do what they want despite being otherwise intelligent enough. They don't realize what's perfectly summed up here: https://xkcd.com/627/
Some of the most important and least controversial efforts to address gender diversity in tech are the people trying to make better toys for young girls. As I've heard it stated, we have a shortage of engineers, not a shortage of princesses and our toy aisles should reflect that.