According to LDS, if the Fall was a positive thing why would God condemn sin in the flesh?

This answer to a question asking about the relationship between LDS and Catholicism contains the following as one of 3 main doctrinal differences between Mormonism and Catholicism: > belief that the fall of humanity in Eden was a positive event because it made mortal life possible (as opposed to the Catholic and Protestant view that humanity is tainted with original sin that requires Christ’s redemption) According to LDS why would God send his Son in the likeness of sinful flesh and to condemn sin in the flesh if the entrance of sin into the flesh was a positive event making mortality possible? The implication seems to be that God actually wanted Adam to sin and then He condemns that which He positively willed to occur.