Conscience cannot stand alone, because of original sin people tend towards evil acts, we will mis-use our gift of reason to rationalize and justify evil. A mal-formed conscience is worse than none at all for a man will follow it to Hell and all the while believe he is doing the right thing.
1783 Conscience must be informed and moral judgment enlightened. A well-formed conscience is upright and truthful. It formulates its judgments according to reason, in conformity with the true good willed by the wisdom of the Creator. The education of conscience is indispensable for human beings who are subjected to negative influences and tempted by sin to prefer their own judgment and to reject authoritative teachings.
Right there lies the error of Protestantism
I actually thought about adding the formation of conscience to my post and should have.( "the road to hell is paved with good intentions".)
Thanks for your insight.