If 90% of people get 0 marks for a methods question then 90% of people are facing the exact same circumstances. It's a matter of dealing with it internally - and the 90% getting 0 marks would probably be at the end end of the methods paper soo You've already finished the exam by then.
And yes, exam anxiety occurs. TBH I have severe exam anxiety, I'd make the stupidest mistakes - I got just under 2 hours of sleep before my methods exam. But my preparation allowed me to reach a certain benchmark.
So no, I will not accept exam anxiety as an excuse for not achieving your results. THERE ARE SOME CASES WHERE THIS MAY BE TRUE. But in 99% of cases, this isn't true.
And if someone who has prepared the same amount and of the same quality as someone who received a 50, then I think that they'll get at least a 40 in 99.9999% of cases.
And can we define the word guaranteed? It's not like people rock up on the day and leave without writing anything coz they're guaranteed. But rather they're just enabled enough and have completed enough questions to solve the majority of the exam questions without any issues and with good accuracy. The difference between a 50 and a 40 is not 2 or 3 marks, but rather 12-15 marks (not sure what it is exactly) - so if you've prepared like someone who has received a 50, there is significant room for error in order for someone to achieve a 40.
I was using the methods exam purely as an example. But it's an indication of the way in which preparation doesn't necessarily mean you'll get the answer. And my point is that many people cannot deal with it internally. Mental illness gets the better of heaps of people.
With regards to exam anxiety, I get that - however not everyone is fortunate enough to reach a certain "benchmark". I can empathise with your experience of exam anxiety, however with all due respect, there are students who experience anxiety far worse than what you may have experienced - because unfortunately for many of those students, they cannot achieve a 35, let alone a 40. For example, imagine you've put everything you've got into a subject, but during your exam, you have a panic attack. Accordingly, your hands are trembling, your heart and breathing rates are up, you feel like you're choking and you experience a sense of derealisation. Now even though this might have lasted 15-20 minutes (if your lucky), you're completely shaken for the rest of the exam, and then, your generalised anxiety disorder starts to kick in - your thoughts go from "I know the answers" (pre-panic attack), to "what if they can't read my handwriting? What if I misunderstood the question? I've lost too much time to go back over things. I'm not going to get into uni, etc." (post-panic attack). - Evidently, your thought processes are all over the place, your memory is inhibited, and you can't focus on the actual questions you're being asked. Therefore, it's extremely unlikely that you'll get an A+ on the exam (as many subjects require to get 40+), and ultimately, you get a SS of 33. So despite your enormous efforts and preparation, your mental illness prevented you from achieving what you deserve or what you were believed to be 'guaranteed.'
- And although you might not think it, this is extremely common; many students are just good at hiding it.
My point here is that anxiety, in my opinion, is definitely a valid excuse for not achieving the results you deserve.
Additionally, I think that you were fortunate to achieve whatever benchmark you were with only 2 hours sleep - because that is some serious sleep deprivation. Psych students would know (as they cover this at the beginning of unit 3) that many symptoms of sleep deprivation include the inability to complete control processes (which the completion of an exam is), an inability to concentrate or focus on one task (again, which an exam involves), slower reflexes and voluntary movements (thus, difficulty writing), and more.
Similar to anxiety, this kind of sleep deprivation is definitely a valid excuse for not achieving a 40 - despite preparation.
(And for a lot of people with insomnia, sleep deprivation cannot be avoided and cannot be prevented by just 'going to bed earlier.')
Lastly, whether there is significant room for error completely depends on the subject. E.g. - in legal, if you lose 9 marks on the exam, you won't get an A+.