An effective kick less used

An effective kick that is seldom used is the jumping backthrust. Perhaps even backthrust is less used also moreover for jumping backthrust. But there are also certain opinions a backthrust is faster though theorically a jumping backthrust can generate more force but sometimes a backthrust can generate much force to score a point and have an impact on the opponent. Actually sometimes a jumping backthrust can be much faster as it is smoother in the sense that there is more flow when doing the kick. Force wise seems to be much stronger as well than a backthrust. But why is it less used because the person really need to be fast, accurate and to do it properly at the right time.