A woman once asked me if she had to submit to her husband if he made a bad call that was not actually sinful. Take, for example, if he said she had to do the dishes a certain way, and that way was less efficient and very annoying. Should she submit to his authority? Yes; even the Catechism says that obedience to "unjust" commands that are not requiring one to sin, is blessed by God because of one's willingness to endure suffering in obedience. I must make it clear, however, that she does have recourse to appeal, and that the husband should listen to her position because she may be able to help him with a better plan.
This principle is seen in many places outside of the Catechism(s). Scripture points it out, and we see it actively lived in the lives of the Saints. It is a central part of the Catholic faith that obedience and submission are not just "something you're supposed to do", but also carry with them a grace (both to accomplish it, and a blessed grace when one does so).
How does this apply to the situation with the SSPX (Society of St. Pius X) and their recent choice to disobey the Holy Father, and his subsequent excommunication of all the clergy involved? I am not a moral theologian, but it does not take a genius to see that something is missing. It might be the case that Pope Leo is incorrect in how he is handling this (but it is not our place to determine that!). It also might be the case that the SSPX Bishops are not just in their decision (and it is not our place to determine that either -- nor is it the place of those in the SSPX!). We must pray that wise minds prevail in this fiasco.
What would happen, I wonder, to the SSPX if they merely said, "we will humble ourselves and submit to the Holy Father and his determinations in this regard"? Is it possible that doing so is all that God is asking of them, and that great graces would flow into their Society as a result? Is it possible that the Holy Father might even accept some of their positions and make some changes? Is it possible that a little trust in God and willingness to suffer might actually bring a blessing? Maybe?