JWP1938
You'd be amazed at the silly mistakes that can be made when you are tired. "They" say that being fatigued is the same as being slightly drunk.
It would be so easy to turn the wrong way in a procedure and your oppo in the other seat being tired too might not pick it up.
Being tired effects your judgement too. Make a rushed approach and try to land off it as your decision making abilities are impaired and you have an Air India Express on your hands!
Tiredness is a killer.
I am glad that you made your post as it allows us to explain why tiredness is an issue.