I don't think it is to play the part that Catholics try to give it; which is something like precedent in the legal-world applied against constitutionality:
Mark 7:1-13 (NRSV)
The Tradition of the Elders
Now when the Pharisees and some of the scribes who had come from Jerusalem gathered around him, they noticed that some of his disciples were eating with defiled hands, that is, without washing them. (For the Pharisees, and all the Jews, do not eat unless they thoroughly wash their hands, thus observing the tradition of the elders; and they do not eat anything from the market unless they wash it; and there are also many other traditions that they observe, the washing of cups, pots, and bronze kettles.) So the Pharisees and the scribes asked him, “Why do your disciples not live according to the tradition of the elders, but eat with defiled hands?” He said to them, “Isaiah prophesied rightly about you hypocrites, as it is written,
‘This people honors me with their lips,
but their hearts are far from me;
in vain do they worship me,
teaching human precepts as doctrines.’
You abandon the commandment of God and hold to human tradition.”
Then he said to them, “You have a fine way of rejecting the commandment of God in order to keep your tradition! For Moses said, ‘Honor your father and your mother’; and, ‘Whoever speaks evil of father or mother must surely die.’ But you say that if anyone tells father or mother, ‘Whatever support you might have had from me is Corban’ (that is, an offering to God)— then you no longer permit doing anything for a father or mother, thus making void the word of God through your tradition that you have handed on. And you do many things like this.”
And people that argue and like to argue are not at peace.