Shepard was voted on that due to his career. For him, he had a pretty underwhelming senior season and there were other West goalies more deserving of that 2nd team goalie spot.
As for Cates and Koepke, they had good seasons, but both All-American? That makes no sense at all and I would bet money that neither sniff an All-American award next season. For forwards from the West, I’d take Wilkie (CC), Petterson (DU), Green (Miami), etc etc over either of them and that’s just players from the NCHC.