Been there done that attitudes are inevitable if you do this job long enough. The trick is not to get complacent.
Regardless of the length of duty day, stage of flight etc, someone must be flying the aircraft. I am in the sim more than the air these days and more and more I see the approaches being done with hands on knees. Almost always the reaction was they didn't realise they were not guarding the controls!
That means they had become complacent. And those of you old enough to have been Fleet Air Arm in the days of TUGG will remember his Flight safety Poster.
A skull and crossbones and the words...
Complacency KILLS.
It's kept me alive through 47 years earning a crust in aviation. I reckon there are a couple of flight departments out there who would do well to resurrect that poster