The hirelings as they are, feel pointless. Like padding that dont scratch the itch people want scratched. Whats so hard to just add to the list of hirelings that already exist a "custom" option.
Because there is no point, since they can be respeced, just like every other character in the game.
You are not engaging in good faith.
If a cahracter is just a statblock, you might aswell play Low Magic Age or Solasta.
But for a game that prides itself in character choice, reactivity and the world acknowledigng what character you made, yeah, customizing the looks, race and sex of a character *is* a big deal.