The problem is there's a difference between a team not being a 98-win team and not still being a very good team. Even when a team is projected to win 90-games on paper (i.e. they're a team that has 90-win talent), people will start to get uncomfortable and hedge because that requires a LOT of things going right -- or, at least, a lot of things not going wrong. Then, obviously, once you take a team's on-paper talent there is a ton of randomness and variance that inflates/deflates wins along the way. Record in one-run games is incredibly unpredictable, for instance, as is a team being "clutch". Those wins are banked, and they count, but they don't tell you anything about a team's ability to sustain success because those things aren't sustainable. For instance, there is a correlation of literally 0 (like, the r-value is 0) when you plot a team's "clutchness" in the first half of the season compared to their "clutchness" in the second half. It is, essentially, just randomness. Being clutch in the first half doesn't increase or decrease your chances of being clutch in the second half, and the inverse is also true.
And there are certainly intangible things that matter, but I think the intangibles considered are different than people are used to. For instance, "clutch" has been shown as something that doesn't really exist. It's not something that's a skill. However, I think teams are definitely going to look at, say, the type of pitcher a guy is whenever they're choosing between 2 guys on paper. Maybe the stats for one guy look better, but the other guy fits the profile of a pitcher they have had a ton of success with, and they choose the latter guy because they think they can coax some value out of him that the statistics aren't reflecting. Or, maybe they just don't want to add a dickhead like Papelbon into their clubhouse.
We'll just have to agree to disagree on the playoffs. I think there's just always going to be a huge divide there between young and old.