Well, I am sure McCullum would say that NZ played 2 spinners in that test and a half fit Boult. At some point, the spinners had to be bowled.
As for the decision being impossible to overturn, that is the entire point of the DRS system. To overturn clearly wrong decisions. Noone expected the tv third umpire to make such an absolute howler and misread the hotspot technology.
Why don't you pull the frame where the camera shows the ball creating the hot spot on the bat? If it's such an obvious case of a "clearly wrong" decision being f**ked up by a "howler" in the box, it should be an easy to thing to show the ball impacting the bat?
I'll save you the trouble, because that shot doesn't exist. Nigel Llong didn't make an error. DRS must show conclusively that the decision was wrong for the third umpire to overrule it. Llong, IIRC, even says something along the lines of "there is a mark on the bat but I cannot conclusively see that the ball made it." Thus, the rules of DRS state the original decision must stand.
Was it out? Almost certainly. Was it "clearly out" live? Not especially. Should it have been overturned? No. At least not under the current rule structure. Most importantly, did it cost NZ the game? Absolutely not. They fell apart and failed to get rid of the Australian tail all on their own.
You'll find I actually disagree with the current rules, I think it turns umpires into TV technicians and puts them at the mercy of the broadcaster and the camera angles they produce, as in this case. But to blame an umpire for the rules that constrain him and the absence of a suitable camera angle for the loss completely ignores, and to a point celebrates, the mental weakness NZ showed after the decision was made.
Think you are far superior side to NZ all you like as a result of Adelaide.
I think you might find I never said anything such thing, if you actually read.