You were arguing about a lot more than just the SF. Anyway, you are reading into it way too much. The lineup was random and as I said originally, you can swap in any of those 4 other guys into the lineup and there won't be a big drop off. You can have so many effective line ups because we are deep, that's the point.
That is just one of probably 10 possible lineups we can have. Through out the year, it can be (WCS, Cuz, Gay, Ben, Rondo), (Koufos, Cuz, Gay, Belinelli, Collison), (Cousins, Gay, Belinelli, Collison, Rondo), the list goes on and on. You are arguing the Koufos should start as if there is only 1 correct starting line up when in reality, the lineups can always change and starting doesn't mean you will play they most minutes. The only ones that will start for sure are Cousins and Gay. Some people will say neither Rondo or Collison can defend SGs, but they will be played together in the backcourt at some point for sure. You are getting hang up on the label.