1) The trespasses offering dealt with sins the know about. Once they got past that, their needs were still not met.
They had to offer the "sin" offering. The "sin" offering, covered even the sins of ignorance that flowed out of their sinful condition.
2) They began to comprehend at that point they have sinned, committed trespasses because they were sinners. A bent alienation from God. An inevitable, intractable tendency to seek our own way. There's not enough people in the Christian world who stand before God with this realization
1) We live in an age where self esteem, is the vogue of the day. The Bible doesn't teach self-esteem, which is the preening of the sinner. The Bible teaches a value residing in the sinner , worthy of saving.
The sinner is not valuable, that deserves a neck breaking. But hidden in the sinner, is not the image of the sinner, but the image of God worth saving. To which Gods Spirit can adhere, and bring forth not just what's there, but bring forth newness of life, by that joining of Gods Spirit with residual image in man of Gods image.