Did you note that in the passages from Mark the word “tradition” was used at least six times? And no doubt that we all observe at least six traditions be they family, work, school or even within the Body of Believers. And there is nothing wrong with traditions unless they fall within the two admonishments Jesus spoke to the Pharisees and teachers of the law:
Mark7: 8 You have let go of the commands of God and are holding on to human traditions.” 9 And he continued, “You have a fine way of setting aside the commands of God in order to observe your own traditions!
13 Thus you nullify the word of God by your tradition that you have handed down. And you do many things like that.”
And how do we know if our traditions “nullify the word of God?” First you have to know the word of God and secondly, compare the tradition to the truth of the Word. If the tradition intuitively “feels wrong” compare it to God’s teaching.