How can GPAs be competitive if youre not being ranked?
I wouldn't call GPAs a 'rank' per se, but, don't forget that the people marking yours grades and assignments are human too. If they see two pretty good papers, they might rank both a six, but if they see a stella 7 paper and then see one of the aforementioned papers, it might turn into a high 5 instead. There are also going to be professors who, unfortunately, are also biased, hangry or have favourites and will rank one person higher on the sole basis of liking them better. So, it's not a 'rank' in the logical sense, but more akin to a comparison? Dotwingz was absolutely correct, not everyone can score a 7. It'll spark more ethical hogwash than it's worth.
Put it this way, a 7 is easy to get only in 3 situations: 1) You've completed the course before and are repeating it with experience. e.g. I could go back to my original degree and re-sit every exam and assignment and score infinitely better now. or 2) The degree you've picked is hyper-focused on your strengths. e.g. a degree with only assignments for someone who writes professional reports, a skilled mathematician sitting a mathematics degree or 3) You pick the most ridiculous degree with only 3 or 4 people and top the class e.g. Bachelor of Paranomal Science of Surf Performance or Turf Management etc.
You've been pretty concerns about GPA across several threads now. If you're concerned that you'll lose your ATAR if you start a degree, you can always take a gap year. Alternatively, pick a university that takes 50/50 GPA and ATAR in first year. The transition to University is (in my humble opinion) not overly sharp (exlucding dentistry, optometry, physio, double degrees and medicine). You have time on your side to do the work even if you work on the side. Regardless, by 2nd year of uni, your ATAR unfortunately, basically becomes naught.