Problem is it’s many airlines and a FEAR OF REPORTING culture. As travelling public we as pilots know which flights to book to minimise risk.
Until pilots consistently write fatigue reports or call fatigued there simply is not a fatigue issue in the companies eyes.
I know one place where everyone complains about a certain flight but in one year less than a handful of reports and well...
Our own worst enemy.
Only even remote possibility to correct is if reports or calls are done!