If people take the idea to heart that none of their misdeeds are actually sin, because they don't have enough knowledge to actually sin, then will they not persist in their transgressions? What would be the purpose of repentance if we have merely transgressed?

17 Yea, there are many who do say: If thou wilt show unto us a sign from heaven, then we shall know of a surety; then we shall believe.

18 Now I ask, is this faith? Behold, I say unto you, Nay; for if a man knoweth a thing he hath no cause to believe, for he knoweth it.

19 And now, how much more cursed is he that knoweth the will of God and doeth it not, than he that only believeth, or only hath cause to believe, and falleth into transgression?" - Alma 32:17-19