Straw man'd
Basically, you are assuming perfect play from Rachel, but not the other player. Rachel runs her game plan perfectly, makes no mistakes. But running that game plan can't happen "perfectly" because it still involves judgment and choices. What kind of mixups to do, what resources you have on hand (george, pumpkin, how much wind, etc). Meanwhile, for the other player, you are assuming they're still making mistakes, even though if we assumed perfect play from them too you just end up at a stalemate. What if Hakumen could just play neutral perfectly or counter everything. Obviously saying, "Well, I lost because I didn't play right" is such a trivial statement that it's meaningless for why you really lost.
The game ultimately comes down to the exchange between the two players, not just "oh I didn't execute my perfect plan that would make me win every time no matter what, and that's why I lost."
Also yeah I loved the matchup info TD.