There are some people in those private schools who are dumb, and some people in public schools who are brilliant. But generally, whilst I do agree with you, there has to be a limit to how many advantages 'regular kids' can get. As I detailed earlier, for a person to get between an ATAR of 96-98 and get rejected by UoM for Biomed to make way for SEAS applicants just because he didn't get the clearly-in ATAR of 98.35 is ridiculous. This stretched to the point of 50% SEAS/50% normal entry to the course last year; the people who should have been offered a second round, even if their ATAR was half a point below the clearly-in, didn't get it.
There is a need for SEAS. But like with any scheme, it has loopholes that people exploit. To not patch over and improve the scheme because 'regular kids need all the advantages they can get' is something I don't agree with. Now UoM is predicted to reduce that down to 35% SEAS entries (which is still above governmental targets) is far better, even if I don't agree with the method they employ to achieve that.
Also, to say that everyone in private schools have the ability to get 99+ is crap. They don't. You have to realise that a 99+, hell even a 90+ is, in the wider scope of things, an amazing score already. They may have the resources, the epic teaching staff, the learning environment etc. but some are just not able to get 99+ without making Year 12 a living hell for themselves.