The reason gilesfan is getting frustrated is because you're ignoring everything that contradicts what you're saying:
-Not every team that made the playoffs had good pitching (Orioles, Blue Jays, Red Sox, Rangers). Not every team with good pitching made the playoffs.
-Even disregarding the statement above, every team that made the playoffs but one had good hitting. Why isn't that just as relevant?
-Even ignoring both the above statements, how is the Cubs/Dodgers series a point in your favor? The Cubs' pitching is by many measures better than that of the Dodgers, so why are they losing the series? Why did the Dodgers beat the Nationals, who had better pitching? If anything, those two series just demonstrate that Clayton Kershaw trumps good hitting, which is very true but not particularly helpful or relevant to the Braves.
-This postseason hasn't even demonstrated the need for a deep rotation - the teams who have actually used more than 3 starters in the playoffs are either out or losing.
At this point you're going to say 'look at the offense-heavy teams that are out or losing.' But look at how they lost - Darvish and Hamels were awful for the Rangers, Price and Porcello forgot how to pitch for the Red Sox. Yes, the Cubs' bats have gone cold, but if it's all due to the Dodgers' pitching, then why is hasn't the same thing happened to the Dogers' [much worse] offense facing [as good or better] pitching from the Cubs and Nationals? At best this just boils down to something like "the playoffs are about getting hot (or not going cold) at the right time," which is just another way of saying "the playoffs are a crap shoot" and not particularly helpful.