Keeping in mind that the whole thing is circular (or at least has elements of that),
Beating a team that didn't beat anyone in the top 500, and not beating anyone else in the top 1000, isn't going to force you very high (that's MNW).
And losing to someone who didn't beat anyone else in the top 1000, and not beating anyone in the top 500, isn't going to force you very high (that's SLC).
If you lose to #49, but beat everyone else (that's MD), you could still be better than a team that beat #59 and #88 (that's OP), but no one better, especially when your everyone else includes #10, #328, #333, and #592, and their everyone else (beyond #59 and #88) starts with #1063.