Human hedge can become a rival Torah.
Corban and hand-washing debates are not hygiene lectures. They are about who gets to define holiness.
Matthew 15 puts a Canaanite woman on the other side of that fence and then feeds a crowd. Holiness is moving off the hedge.
When the temple fell, many fences fell with it. What remains is the word of the Son.
New Creation holiness is life from the heart the prophets promised, not from a hedge around Sinai.