I was not "taught" much to do with a manual transmission, but now I think I have a pretty good grasp of it. I've never done a hand-brake turn though. At first, I even struggled because the brief instruction I had had was from a used-car salesman and I barely learned enough to get my first manual transmission-equipped car off that lot. But I learned hand-brake hill-holding and foot-brake hill-holding, eventually, by trying them out when consequence-free opportunities presented themselves. There is a maneuver in turns, when you might need to make a gear change in a turn, that calls for manipulating the brakes, clutch and gas in coordination with the gear change, so the hand brake in that situation would not be right and your hands are full anyway. The goal of this maneuver is to maintain smooth momentum and change gears. So I think people should learn all the techniques.