Apparently you’ve got it wrong. A guy in the thread runs that scenario - we lose one and go 2-1 in those three games - and our RPI still comes out higher than if we go 3-0 against these sub 300’s.
The comments in that thread, in general, are an interesting read.
Because the real question is how much does RPI matter to the Committee at this point vs. KenPom, etc.
I can think of examples that suggest they are wedded to the former less and less.