Because that doesn't work for me. My front squat goes up fine when I do that, but I've made more progress on both back squat variations by doing a lot of relatively light and fast submaximal training. I've rarely done rep work on the squat for over 350, but I still managed to increase it a good 40lbs recently.
The hang cleans are for explosive work. My routine is strength based, but with a secondary focus on athleticism and tertiary focus on upperbody bodybuilding.
I prefer full cleans to power cleans. I'm training hang and block cleans specifically for a couple months to improve my speed under the bar.
The main purpose of the conditioning work is to improve speed-strength and explosiveness as well while improving my endurance for whenever I opt to play basketball.