I agree that apostolic succession is not Biblical but
hijacked by pagan Rome during Constantine era, but rest you say you are gravely, eternal consequence mistaken.
Christianity was just another sect of Judaism, until Constantine
hijacked it
by adding Greco - Roman mythology to it (e.g. Jesus human son of top god Jehovah replacing Hercules human son of top god Zeus), and
pagan festivals (e.g. Christmas replacing Yule, All Saints Day replacing Halloween, Valentine's Day replacing Juno's day, Easter replacing harvest festival.