A good episode is one in which both sides of a moral issue can be intelligently defended. "Dear Doctor" does not qualify. Phlox's position is based on religious dogma, pure and simple. Dogma that's especially appalling coming from a medical doctor. There's no logical reason he wouldn't apply those beliefs to any and every patient.
"Bat'leth to the gut? Sorry pal. If you were dumb enough to piss off that Klingon, you deserve to die. Evolution."