Ego is at the root of sin, but also at the root of obsessive preoccupation with one's sinfulness. If the goal is to weaken the ego, then too much fretting over one's sins in the manner of a Wittgenstein is contraindicated.
There is such a thing as excessive moral scrupulosity.
Though Wittgenstein's ego drove him to scruple inordinately, he was a better man than Russell. Russell worried about logic. Wittgenstein worried about logic and his sins.