First of all, you shouldn't assume what goals people have or don't have. Maybe I do really want to "achieve" a certain UAI (however lame that sounds), or maybe I don't. I assure you though, I do not truly want to redo the HSC. There were problems with subjects/timetables, I didn't like the way they seem to teach/talk down to you, but the #1 reason I have not gone ahead with it is because I do not want to do it. I shouldn't have to do it in the first place.
Secondly, my goal isn't to simply get into uni. If it was that simple, I would be at a uni on the border of NSW/Victoria or in Wollongong right now studying something I don't want to do, or one that doesn't even offer what I want to do because its so small, but no thanks.
When it comes to TPC/TAFE diploma, unfortunately it is not as simple as you put it with a lot of unis. Believe me, I have inquired a lot to the extent that the admissions people would know me pretty well by now. I don't feel like going into detail and this post is already pretty long so all I'll say is, the way they explain it to me, even if I do really well in the TPC or get a very high average in a TAFE diploma - in other words surpass all their requirements - I would be extremely lucky to get into what I want to do.
At least the HSC/UAI presents a clear cutoff that if you get, you're pretty much guaranteed a spot.
I believe its too late for tpc/diploma now anyway :/