Then, why are they changing everything so often?
I don't think they are stupid, but I don't think they are aeronautical gods, either.
The recommended method is OK. But adapting to circumstances, optimizing or being more conservative, as required, shows good airmanship. And refusing to depart from the recommended technique no matter what because that is what it is in the book, that is poor airmanship, and I am sure none of us do it.
Don't forget thaf we have now a stall recovery procedure. 20 years after the advent of the 320.