A lot of people still in denial, still can't accept a simple fact. You will always find reason to convince yourself that the little things that happened around that punch (stepping, tripping, lousy jabbing, carelessness, over aggressiveness, broken nose, the one second remaining, Pacquiao leading the fight, etc.) is all about luck.
Marquez was lucky Manny agreed to a 4th fight, he got lucky Arum set up the fight, he got lucky Pacquiao became a congressman, he is lucky when Manny became a pastor, he is lucky there was a thyphoon in the Philippines and Manny was distracted by that. He is lucky Roach is on a losing streak, he is lucky Ariza did not do S&C properly with Manny. He is lucky he wasn't caught with PEDS, he is lucky Beristain is still alive to coach him, he is lucky Memo joined his team. He is lucky that he is more powerful now.
Everything that needed to happen for him to deliver a punch that he has thrown thousands of time against Manny and throughout his 2decades of professional boxing career including countless hours training happened at 2:59 of the sixth round. It was just luck!
We'll just have to agree to disagree on this one. Because other wise, there is no legitimate KO in boxing. Every KO should be a lucky KO punch.