Mainstream Christianity teaches basically that man cannot ever stop sinning and therefore the "God-Man" Yeshua is the only one who was ever able to do it. While it is true that all have sinned that fact does not negate our responsibility to stop sinning and cut off sin from our own "temples" as even Yeshua himself commanded on more than one occasion:
John 5:14 Afterward Jesus findeth him in the temple, and said unto him, Behold, thou art made whole: sin no more, lest a worse thing come unto thee.
This man was made whole without the shedding of any blood and told to sin no more.
John 8:10 When Jesus had lifted up himself, and saw none but the woman, he said unto her, Woman, where are those thine accusers? hath no man condemned thee? 11. She said, No man, Lord. And Jesus said unto her, Neither do I condemn thee: go, and sin no more.
This woman was forgiven, not condemned, and again, without the shedding of any blood, and again, told to go and sin no more.
Did Yeshua go around telling people to do something they could not possibly do? If what Yeshua commanded these people to do was realistic then why does mainstream Christianity teach doctrines that nullify his commandments, one of which was "go and sin no more"? Therefore, if one continues sinning then he or she tramples the blood of Messiah who gave his own blood to confirm the covenants and to confirm his Testimony. It is the Testimony of Yeshua, which washes us; but only if we understand, trust in, keep, guard, and do all those things.