I have a proper, grown up professional contract which means that I have no set working hours; I just have to get the job done. The French scheme would be completely impractical for me and my professional colleagues because none of us knows when the others are working and so it would be damn nearly impossible to send a group email when all the recipients were working.
As so often with EU legislation, what looks worker friendly is anything but. It's really an attempt to get everyone to work 9-5.