Given the 10,000 hour rule as generally true (at least in spirit), what's very difficult and seldom discussed is just how hard it is to get there at anything worthwhile once you're passed a certain point in life. Why? Because job. Having gone through college and taken work terms between years, I saw this first-hand: after you're done 9 to 5 for that paycheck (+food, +commuting, +exercise, +social life), good luck fin…
It's interesting you didn't mention family at all. Having kids is a huge commitment of time. I think a good take-away from your rant (plus the consideration of family) is that we need to be talking more about making time for things. Too often we talk a great deal about what can be done in a few hours a day, but when it comes to making that time, we just say, "If it's important to you, you'll make the time." We should…
I'm not sure it can be done. The best way to maximize the use of small chuncks of time is to join them into rarer big chuncks of time.