As a serious statistics person, 6-sigma drove me nuts with it's own separate from reality probability tables, and their own separate terminology from the entire

As a serious statistics person, 6-sigma drove me nuts with it's own separate from reality probability tables, and their own separate terminology from the entire history of statistics, and their reasoning methods were simplistic and their role titles were immature nonsense: "black belt"?!?! It really felt to me like a massive fraud. But oh JACK WELCH endorsed it, he's a GAWD! Yeah, I smelt that shitty decay long ago, and I probably got somewhat of a bad reputation for bad mouthing 6-sigma during it's hay days. One of my in-laws was seriously into 6-sigma, had his "black belt", and is a bit of a giant dope, so that did not help...