No, we don't all agree. Not when the "diversity" is someone looking at the market and saying "there are too many good movies. we need some shit ones". Nobody needs to diversify away from quality, which is essentially what the French laws do.

Don't mistake the bizarre fetishes of a small number of French elite with some kind of natural law or elegant philosophy. The French government have to protect their cultural industry because it produces bad stuff that even the French don't want to watch. There is no justification for this: every attempted justification boils down to sophistry.