The quality of players post-game interview varies widely. Some clearly don’t put much thoughts into them because they would rather go home. Niemann is in good company here. That was nothing particularly exceptional.
And if you don't want to and just would like to go home, fair enough, but then you really shouldn't give an explanation which is wrong!
It's a pattern with Niemann too, he's infamous for saying only "The chess speaks for itself" after beating Carlsen with black once before.
I think the parallel with academic cheating is accurate.
