No it isn't. After scaling, scores can be compared to have roughly equal difficulty. Thus, a 40 (scaled) in history is an equivalent achievement to a 40 (scaled) in specialist maths. Scaling has nothing to do with innate difficulty of the subject (except amongst the maths, which are objectively compared to each other) and everything to do with the strength of the cohort that takes the subject.
No it isn't. After scaling, scores can be compared to have roughly equal difficulty. Thus, a 40 (scaled) in history is an equivalent achievement to a 40 (scaled) in specialist maths. Scaling has nothing to do with innate difficulty of the subject (except amongst the maths, which are objectively compared to each other) and everything to do with the strength of the cohort that takes the subject.
No offense but from direct experience, the difficulty of History was equivalent to that of Specialist Maths. However, considering the number of dates that I had to learn and the sheer quantity of course material I had to commit to memory, I expected to do far better in History than in Spesh, but Spesh topped the lot with the scaling. History was scaled up a meagre 1 point and the amount of effort I put into the subject did not lead to a direct increase in my score. Mathematic and science subjects on the other hand, you do more practice exams and you are practically guaranteed to do well. With humanities, you simply have to be talented in the way you word things. That talent will pay off in marks.
Are humanities your strength and how strong was your cohort?
My GAT (and I put effort into the GAT and didn't just blow it off), shows Maths/Science as 47, Writing as 46 and Humanities as 44. My GAT was also an uncanny predictor of my performance in my subjects. I don't really have stengths/weaknesses. All subjects are roughly the same for me. Cohorts were all strong but I had a crappy, crappy Spesh teacher.
My 41 in Spesh went up to 51.25 after scaling and my 44 in History went up to 45. So at the end of the day, scaling meant I got a 99.35. If I didn't have Spesh, I would not have gotten a high mark. So scaling makes an enormous difference. I chose History because I had an awesome teacher but to get the super high marks.... well good luck in humanities. Some of my students in my cohort were fainting from the effort of doing History and Global. I'm not sure about the other humanities, but it would not be an ultra good idea to do loads of them. You'll be writing essays and notes for _every_single_one Balance is good.