Because sinlessness is the original state of existence, that would make sin an illusion.

Ppl pretend sin exists by going against morality, essentially acting as if they are a sinner when they’re truly not in order to fit in & be accepted by a corrupted society.

Playing their part in the grand illusion, they do wrong so they can avoid persecution whilst simultaneously pretending to be innocent as well. Their own life is a contradiction.

They participate out of fear of being alone and cowardice, pretending to be something they’re genuinely not at the core. No one at their core is a sinner, as every being is innately sinless, but when you pretend to be one, you effectively become one, mimicking the effects, and becoming insufferable.