But thats just how it works.

As the game is right now, if the doctor reveals himself, its a three way. A 33.33% chance of nabbing the killer while reducing the killer's ability to influence the kill.

If the doctor doesn't reveal himself and by chance the killer gets him tonight, we're left with a three way with no clears. Meaning all the killer has to do is convince one person to get the other and he wins. Thats a 33.33% chance of winning as well but this time the killer can do his sneaky shit.