a) Again, the Sacraments are for us, not for God.
b) Jesus didn’t say to the thief, “repent and be baptized”.
c) Where does it say “everyone”? Jesus and apostolic teachings are quite clear, one must be taught and accept Jesus before one is saved, IN THIS LIFE. The Mormon idea of being baptized after this life is over, is pointless, not to mention irrational. Also clear that a person who has not been taught isn’t judged on what they don’t know. Being judged according to knowledge is a gnostic heresy. One does not have to be an intellectual elite in order to be saved.
You’re dead, and a Mormon missionary knocks on your spirit prison cell door and says, 'hey, if you want out you need to listen to me and accept a baptism that has been done for you". Seriously, you think this represents a choice?