It's actually 5 majors, drama has two. And I did start in Year 11 actually, I had a whole lot of my Extension 2 done before the beginning of year 12, don't make half-arsed assumptions.
Again, I reiterate, you don't actually DO any of these subjects at a senior level. You don't understand the commitment and hard work that is actually put into these subjects. To give you a primary example, Music 2 scales better than Physics. Why? Because it's about 3 times harder, and requires you to be analytical/conceptual/theoretical/practical etc etc etc.
Just to pick a hole in your argument, Society and Culture IS a social science subject, so I don't think they've left all the 'shit subjects till the last week' as you so ignorantly asserted.
Honestly, you're a fuckwit. A major work is one of the hardest things about the HSC. They require independent investigation, consistent motivation, money, time, skill, logic, creativity, the list goes on. I truly don't understand how you can deny that an arts subject deserves just as much merit as a science or maths course.