You can't explain it any more than that because there is nothing to explain other than people have noticed that some of the recent Cup winners have bigger defensemen. Ergo it's a talking point that people are presuming is true without much in the way of actual facts. Trend, yes, but if someone is arguing that we need Schneider more than Nils because "Schneider plays hockey that wins in the playoffs," I'm going to need that quantified more than "He's 6'2 and tougher."
I'm not trying to nit pick against you - I'm saying the argument as a whole that is permeating this board is simply unfounded. It's not your fault you can't explain it, there's nothing to explain because it's simply anecdotal, and that's the point.
We will have a better chance to win a Cup running out there with Fox, Nils, Lindgren, Miller, and then two out of the three of Trouba, Robertson, and Schneider ...... as opposed to leaving out Nils and having all three of Trouba, Robertson and Schneider. Yes you need size in the playoffs to an extent and we will have it one way or the other. You also need pick moving and offensive ability. Nils' skillset as a "Fox lite," isn't something that should be downplayed as a negative, it's a huge boost to our chances. The slight loss of size in subbing in Nils (6') for say, Schneider (6'2) is marginal when compared to his offensive skillset. We will still have FOUR other defensemen who are either huge or play with lots of physicality. I also think some are believing Nils is a pushover because he's a Euro.... I don't think he's particularly soft.