Let's say a player really just isn't very intelligent. why would he take the thing? Let's say he in fact either can't read or has dyslexia really badly or some other impairment that makes reading quickly while under pressure difficult - why would he take the voluntary test? His agent may be to blame here.

2nd - if you are going to take the test and then blow it off and take a nap or fill in bubbles, why take the test? If you agree to it, take it seriously or don't take it.

Is it like a massive red flag if someone doesn't take the test? seems like scoring really badly is worse than just refraining from taking the thing.

I dunno.

IF IT REALLY DOESN'T MATTER TO GM's WHY TAKE IT AT ALL? and if they really don't care, why is it a thing at the combine? I guess maybe if 2 players are equal and one aces the thing and one gets a 9 you go with the high score as a means of a tiebreaker.