They probably do have a case if it is true, however it is also ridiculous that the people that release the aircraft for flight day in and day out (LAMEs) have no limits on their duty time.
I have always thought it crazy, the Pilots that fly the aircraft have very strict limits on their duty times, but NO limits at all on the people that certify the safety of the same aircraft.
And I don't mean like maybe having to extend a little while after a shift, I mean for example having already been working over 24 hours straight, having to continue to work and certify for an aircraft because there is nobody else there that can do so.