What's with the crazy, long theories?

Brett Partridge is Roy Tagliaferro. Brett Partridge is Red John. Do we really need to make theories with our own plotholes to steer it to being someone else?

If someone wants to say "Brett Partridge is dead," that's cool. But he's still Red John. Red John isn't dead, he's just killed his another alias. So I don't get how Brett Partridge *isn't* Red John. If you could please tell me 1 good reason that completely wipes out Partridge, I'll be happy to believe you.