Sure, it does suck. But things change, and this is one of those things. The present solution has the Louvre closing without warning because they are short staffed, and that will only become a more frequent problem if they can't find some solution. Would you rather live in a world where you have to plan your visit to the Louvre, or where the Louvre will be randomly closed 5% of the time?
First and foremost, any implementation where staff walk off the job is not a solution. So status quo is worse than any alternative plan that addresses that issue.
Did you not read the thread? They are not paying enough to keep their staff working. Their options are to increase prices, decrease availability, or do nothing and hope it works out.