I think you make a good point. To add to it: Take those 2 minutes of personal time. Halve them because teachers don't try to maximize personal time (I suspect

I think you make a good point. To add to it: Take those 2 minutes of personal time. Halve them because teachers don't try to maximize personal time (I suspect that's still high). Then multiply by 6 classes per year on average for 16 years. That makes 288 hours. Such a small number for such a long education. It's less than 2 months full time work. It's so little. This does not even begin to approach the estimated 10,000 hours it takes to actually get good at something.