It's true, Sanzo only knows how to do one thing with the sutra. He does it quite well, but it's still just... the one thing. Sharak could do a lot more with the Kouten, but still had to chant like Sanzo. Ukoku didn't even have to chant to use the Muten. And Koumyou put them all to shame, when he was alive...

"They're breathing, aren't they? So they're idiots."

You're all idiots. He's also an idiot, but he won't admit that bluntly. If Devero picks it up in subtext, that's just fine! And if he doesn't... well, not all idiots are created equal.

And off he goes! Sanzo charges after him, of course, vanishing the gun back up his sleeve as they go.