Sure, it may not help him now, but at the start of the game, depending on who you are(or were as the case may be), you have anywhere between a 1/2 chance to a 2/3 chance that you are pointing at one of the good guys/neutral/villager. You could just as easily point at anyone else who has pointed at a villager and say that they are a monster. Following your logic, if Philistine does get lynched and he is a villager, you should be a monster then.
Unfortunately, I still have to agree with your logic, but only partially.
(and yes, facts do change. But not all of them all at once)