The problem is, in your eyes, the only reason that anyone would make those arguments is because they're Ainge apologists who will "defend Ainge and Ainge's decision making to any extent necessary".
No. However, certain posters -- and you're among them -- have *never* criticized any decision by Ainge, and routinely go out of their way -- often using twisted logic -- to defend him. Sometimes, the obvious answer is the correct answer: Danny left this team short-handed.
Did KG's injury hurt this team? Of course it did. However, so did a lack of a small forward. Even prior to KG's injury, Paul was playing more minutes than they did last year. This, coming off a very short off-season. Fatigue was going to be a factor, with or without KG.
Also, the reason I don't engage in the debate of whether having KG would have made the Chicago or Orlando series shorter is because it's impossible for anybody to know. Last season, we went 14 games with Atlanta and Cleveland with a fully healthy KG. There's no guarantee that he would have made the difference that we all expect he would. Also, of course, even if we'd gotten by Orlando, would a healthy KG have been enough to rejuvenate Pierce for an additional 8 to 14 games in the next two series? I find it doubtful.
There's a reason that teams add bench depth. If teams could get by with a 6 or 7 man rotation, they'd do it regularly. Unfortunately, it's just not a realistic possibility. Danny didn't do his job as well as he could have. He made a terrible miscalculation in believing that Tony Allen could fill the role of James Posey. That was a mistake. He didn't need to bring back Posey, but he *did* need to fill the 3 hole with a competent basketball player.