Why KC might be onto something.

Losing to a top 3 team is fine coz it's anyone's game based on which team had a better game overall so the pressure may not be as high.
Now when you go against a legendary team like KC that got trolled early on,teams going against them would be under pressure, if you lose you're losing to a trolled team, which will make the audience troll them more.
It's Basically top team vs second best team - whoever wins and loses not that big of a deal.
Best team vs least rated team - imagine being the best team and losing to the least rated team (KRU [#10] almost beat Loud [#1])

watch kc beat fnc

Chow1E [#2]

watch kc beat fnc

Honestly there's a very very small chance it happens. The probability is very low.
It's never zero