No, I am simply talking about the part of your post I highlighted:
"If he had picked his fights he'd be unbeaten too."
Calzaghe fought and beat the guy that Froch lost to, so Cazlaghe clearly didn't 'pick' a fight that was easier than fights that Froch 'Picked' In fact Froch lost to an already beaten fighter. Calzgahe beat an unbeaten one.
I agree that if Froch had 'picked' differently (and avoided the fighter that JC had already dismantled) that, yes he would be unbeaten, being that Kessler is the only one to beat him