That's not what's being discussed.
Of course if you are entering into examinations of any sort, you try to do the best you can...just like anything in life, try to do your best.
Anyone going into ATPL examinations doing anything different is foolish.
and I was always told, anything above 75% is wasted effort!
I think you may be misunderstanding something-
I believe Kissmyqsquirrel(love that name....hehe) is referring to joke that a well known ATPL ground instructor used to make about wasted effort-he's not being serious.