I think what people are neglecting to note is that it is VERY HARD to get a 99.95. Like I can't be bothered wrangling the exact number, but only 40 something get it out of thousands and thousands of students.
But on that note, sure the majority of kids getting 99.95 do go the 4U maths/chem/phys way, probably because those subjects attract a high percentage of academic students. However, many humanities kids do get 99.95 too. And getting a 99.95 or any ATAR for that matter, will be easier with the subjects you are INCLINED to-so if you are humanities inclined, it will be easier to 99.95 with business, eco, 4u english etc. and vice versa, a maths/science person would find getting 99.95 with 4u maths/phys etc. easier than humanities. I dare say that if they did not pick subjects to their strengths a 99.95 would be out of the question.
So if you are good at business, keep it.