Alberto I have to disagree.
I have seen some shambolic approaches that come across the threshold on speed with a sensible power. Also, pilots have different opinions of what is good/bad/marginal weather. What happens when the FO is tired and the captain is fresh? Does he turn to the FO and say "it will be alright" and apply his particular stable approach criteria? Stable approach gates are there for good reason, some maybe on the cautious side but they protect pilots from each others differing views on what is and is not acceptable.