No no no, never ever, oh my goodness no, I can't believe anyone considers this.
Why? Because it's really pointless! If it turns out that you aren't great at VCE, that doesn't mean you won't be good at university. You can transfer into courses if you perform well somewhere else. Additionally, so so so many people enter university thinking they know what they want to do, but they actually get a better idea of what they like if they take some time out to study at a higher level. There's no point spending an extra year to get into X course, when there's no guarantee that a) you'll get into X course or b) if you did get into X course you'd want to stay there. And there are so many more reasons too like:
- actually getting to study something you're interested in.
- studying something new and not doing the same things over again and not wasting a year 'learning' things that you just learned last year.
- having a guaranteed option in studying something else rather than using another year to essentially be unsure about where you'll be (as if your entire high school life wasn't enough)
- Not having to wake up for 9am classes every damn morning.
- Being able to put 'high school graduate' on your CV.
- Because whatever mark you get won't be that bad anyway, because you need to learn as early as possible to get over your perfectionism in order to cope with the basic ups and downs of life.
- To learn that it's more than grades, it's what you actually learn and get out of your time. Grades don't give you a full picture of what you achieved.
- Because there is so much more to life than VC freaking E.
- Because high school kind of sucks generally.
And probably more. I know it probably sounds a bit rich coming from someone who got into their first preference, but seriously. I think this is the worst idea ever. A good idea is to not have regression as part of your life.
This doesn't apply to everyone, example medicine:
-if you are serious about wanting to do medicine, transfers are unrealistic, plus it rules out Monash and makes UNSW very difficult (the two i, and others, most want to go to)
-there is no high school anymore, we have graduated, but some chose to do extra subjects at TAFE, hence still 'high school graduate' just extended year 12 studies
-can still do heaps of things interested in~
-only having to wake up some days for 'school' unlike some who will have everyday for uni (if doing biomed, or high sciency contact hours) instead of doing a few vce subjects and being casual having more time to study for things like UMAT during the day espesh with only 2 subjects (if this many)
-MOST IMPORTANTLY INCREASES CHANCE OF MEDICINE

- but true, you may waste a year potentially, but only do this if you are SURE you can do better and have a good chance of getting in (not great, but good.. )
etc..
I'm not sure why anyone would repeat and stay at high school, i can imagine most would do only a couple of subjects and have the above advantages.