All doctrines and all biblical interpretations are traditions. The doctrine of the penal substitutionary atonement as the interpretation of Romans is a traditional interpretation. So tradition is not something imported from the outside without roots in the Bible or not subject to reform by biblical revelation. Tradition is not a rival to the Bible or an alternative to it.
Does the fact that there aren’t any federal laws indicate that the abortion debate is over? The debate is certainly over if it is true that morality follows law. However, morality doesn’t and can’t follow law, law follows morality—or at least it should.