I know I know, from an outsider perspective the robbery at the Louvre might, especially considering how basic the plan was (no high-tech devices or anything) seem funny. But frankly it is a catastrophe.
The pieces that were stolen are among the very few (for a European collection) pieces of French royal jewelry remaining in public collections in France, and are more likely than not going to be dismantled for their gems really fast so lost forever. Their historical and cultural value is incalculable, because, again, we simply do not have a lot of French royal jewelry.
Even more worryingly, the Louvre which is the biggest museum in the world and one (if not the) most visited museum, is probably the French museum making the most money (sorry for the link to the Figaro, but this article is in fact full of interesting data). That such a theft can happen at the Louvre probably means that all the collections presented in French public museums are in danger of being robbed.
And lo and behold, this theft is taking place in a context in which several French public museums have been the victims of robbery! This is of course linked to the ever decreasing money afforded to conservation in this country, because culture, art, history and preserving all three of those is of course not important enough to be properly financed. Do you think the Louvre getting robbed of such important pieces in such a ridiculous way is going to change things? Absolutely not! Public heritage is going to keep disappearing in private collections or simply through poor conservation, because our public powers do not deem that important enough.