“Like wise with Paul. Take a concordance and see how often the apostles cited, “it is written” as support and how often they said “it’s traditional to do this and such”
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Christ or Paul reminding the people of the time of the
written word of God doesn’t make the oral tradition of the
Old Covenant less. Sometimes it was to remind them the “written” was being fulfilled before their eyes.
Think of the New Covenant oral tradition you do accept, it’s
pretty important, yes?
The oral traditions of both old and new covenants were and are important and those traditions Jesus castigated were those that conflicted with the written word, saying, “it is written” or “have you not read?”.
In Matthew chapter 12 Jesus showed the Pharisees knew what the Law said but didn’t truly understand what it meant and then Jesus pointed out how the traditions of men contradicted the written law of God. (Matt. 15:1-11)
Therefore if we are to avoid that error of the Pharisees we would do well to compare any tradition to God’s written word and reject what does match it as Jesus did.