Believe me good players do take advantage of the narrow nature of the shadow words, I’ve been killed by a LOT of 4 attk minions over the years!
And that’s the problem, Priest is a good class vs bad players, but often useless vs good players, because they know to deny our narrow openings, i.e. a bad player will silence that upgraded steambot and go face , then get killed next turn and create a Divine Spirit/Inner Fire is busted thread, whereas a good player will kill the 'bot and leave the priest with a handful of worthless cards.
Yeah I could start running MC and surprise a few players, but my winrate overall would go down because there’s a reason MC isn’t played in good decks, it’s like saying Warriors could play Rampage, yes it would surprise a few people, but it still wouldn’t be a good call.
Just look at tier 1 decks , they mainly comprise individually good cards that are even better with synergy, very few narrow cards in them.