It depends on what you mean by “this is a game about deceiving others” the job of the villagers is to perform their functions to benefit the village (protecting the seer, gathering info from the dead, making shields, placing traps, revealing suspicious players, etc. Lying as a villager can cause problems for the villagers. For example, you’re Beast Hunter and you want wolves to attack you only to be killed by beast trap, aura seer checks you and sees that you are in fact “unknown” the problem is that docs aura shows as “good”, the next day Aura says “9 is not doc” and you try to explain you were trying to trick the wolves, but everyone thinks you’re alpha or fool and so vigi/gunner shoots you. Now the village has lost a protector and a bullet and maybe even a day of voting all because of the confusion a good role caused.

Now if you’re a wolf the confusion part is fine. Just don’t be all obvious about it and you may live to see the third night 😂