Since one can always confess their sins and be forgiven, isn't Christianity/Biblical law basically useless?

Yes the law is useless, especially since there is a place in the bible that says if you have died and gone to hell for your sins, you can call out to Jesus Christ and except him as your savior and let him into your heart and repent for your sins and that God will lift you out of hell and take you to heaven, if you truly change in your heart. So OK, one can repent for their worst sins anytime before they die and still go to heaven after a life time of child molesting and raping and murdering and every heinous crime/sin imaginable. If they don't do it in life they can still do it from hell and be lifted out of hell and still go to heaven, making no punishment permanent. How scary to sin! Oh my! I can do it all I want and then just say I am sorry at the end and go to heaven anyway, how motivating to not sin. It makes the ten commandments totally useless in every way. Forgiving your own self seems the only motivator to be moral here, and that isn't even a problem if you have no conscience. Excellent point Printninja!