truejedi
I think my Tiger Woods analogy on Luke is a good one. Unquestionably the best, but can still lose. Or the NFL "any given Sunday" thing.
That, in no way, explains how Luke's failure to overcome Rhea is PIS because Maul lost to Kenobi.
The distinction is rather simple, which is why it disturbs me that you've failed to recognize it. The "any given Sunday" expression is definitely an explanation for Maul's death. Why? Because it means that, under a certain set of circumstances, a superior opponent can lose to a weaker one. Under certain circumstances, I could kill Jet Li in a fight.
That's it.
Those same circumstances would never, however, allow me to outfight him. He's a black belt in several martial arts. The fact that he may not be feeling good won't turn me into a black belt and rival him in skill. Which is exactly what Rhea did; she challenged Luke on even terms.
Now, in the case of Maul and Kenobi, Kenobi was outclassed in every meaningful way. The only time he stood up to Maul with any significant effect is either when he was tapping into the dark side or had Qui-Gon on his side; the narration made it very clear that alone, he didn't have a chance.
You're comparing apples and oranges, and it doesn't fly.