Good judgement is an uncommon, uncomfortable and expensive thing. The individuals who follow the usual dev process suspects don't want to deal with that so they

Good judgement is an uncommon, uncomfortable and expensive thing. The individuals who follow the usual dev process suspects don't want to deal with that so they buy into the snake oil. Every so often it becomes obvious the current snake oil prescriptions aren't working, so the dev process industry pivots to a new approach, usually by taking something that does work (if you have good judgement) and bastardizing it.