If the French are so concerned about air safety they would be better off targeting the problem of their pilots and ATC using the French language in busy international airspace.
There has never been a concern for air safety in the French law to limit pilots flying after 60.
The real reason behind the law was to solve a seniority problem between AF and IT and to make the French Pilots pension fund pay for the redundancy of IT pilots imposed by AF pilots union. Air safety... what a laugh !!!