According to who? You...
Father Zigrang was disobedient... and the Bishop would win.
You might not like the fact that the Bishop has not given the indult (except to two parishes), but saying the Latin Mass without his permission is disobedience.
Quo Primum guaranteed priests the right to say the Traditional Mass. It has never been abrogated. The Bishop will lose.
Bishops are not God. Obedience to them is not absolute. One must obey the Faith first.
saying the Tidentine Latin Mass publicly without his permission is disobedience
"but saying the Latin Mass without his permission is disobedience."
When was the Tridentine Mass suppressed? How was that done?