In my opinion, no.
Personally, I believe your best bet is to pick the subjects you would enjoy doing. If you pick subjects you like, its easier to remain motivated and therefore do better in the long term.
I am currently studying HSC Business Studies - fair warning, very little is applicable to real business situations from what I have found, and if you combine it with Economics (as I did in Year 11), you find it rather infuriating over time. The textbook we use Business Studies in Action descends into 'management-speak' quite often - you know, the stuff where they ramble on about 'synergy', and a large chunk of the course is about being ethically and environmentally responsible. Not trying to scare you off, or anything - but I found it very different to what I expected.
If you aren't interested in Physics, don't do it. Simple as that. Fuck how it scales, fuck how it influences your ATAR, fuck how it combines with MX1 rather well. If you aren't interested, you WILL NOT do well unless you're ridiculously motivated.
In my opinion, if you intend on going into a Business-based Uni degree, Economics is infinitely more useful than Business Studies - but that's my personal opinion.
So, yeah - do whatever you want to do as subjects. If you're committed and do well in them, you can get any ATAR with your subject combination.