LOL (you're making my sides hurt) - Why would they go to the Court to inquire about secession when they considered it a right and had no questions about it. That's silly. You're confusing issues. No wonder, given all the waltrot about it posted by the neo-unionists. They did not see secession as something requiring any Court action. It was simply a right, and they did it. Once again, if the other States that remained in the union thought it unlawful for them to do so, then they should have filed grievance before the Court.
It would have created a precedent...
LOL - It was a right established at the formation of the Constitutional union and did not require a "precedent".
That is exactly the point. It is also of note that the U.S. Supreme Court only hears timely and material cases. It does not issue advisory opinions at the request of a state seeking to secede. This does not technically prohibit the court from ruling on secession, but in order to do so it could not be an advisory request of the seceding state. Instead it would have to be on a case arising from a motion to block that act of secession - essentially meaning that the right to seek this ruling you speak of was with The Lincoln. As we all know, he opted not to do this. Instead he consciously chose the bloodiest path and form of warfare out of untold many options both military and diplomatic.
They would seek a ruling from the US Supreme court to avoid damage to the institutions and nation from whence they came. To prevent a Civil War. Pretty good reasons if the true intent of the confederates was to go in peace, don't you think?
At the risk of causing your head to explode, let me add something from one of those old meaningless documents you neo-rebs like to thumb your nose at
"Prudence indeed, will dictate that Governments long established should not be changed for light or transient Causes" -2nd Continental Congress July 4th 1776
What noble confederate Cause was there other than the protection and expansion of slave power?