Secret 3D scans in the French Supreme Court

This is utterly puzzling to me.

I just don't understand how you sit on the museums side of the trial on this, without seriously questioning your own position and conceding immediately.

They were basically arguing that they are entitled to hide those scan artifacts to better protect their gift shop?! How can they even reconcile those arguments with preserving the artists legacy/serving the common good?

I'm also surprised at how nonchalantly the french supreme (!!) court seems to cope with the museum just ignoring their two month deadline for three months in the new trial... Is there no equivalent to "contempt of court" in french law? Is this typical?

My conclusion is that there is either pure stubbornness or some weird, jealous hoarding mentality happening on the museums side, because I have no other explanation why they would fight so hard for their position seemingly against all reason.

There is no supreme court in France, this is a gross mistranslation of "Court de Cassation", which is where you bring your case after you have lost your appeal, and is the last court where you can try to argue your point.