Well ...
First of all, in order to be effective with polearms, you need Strenght ...
Bcs the only thing proficiency with weapon gives you is +2 to hit ... and in BG-3 option to use special moves (with wich you usualy want to hit btw) ...
Meaning for all other classes that have at least 14 in their respective main stat ... that their chance to his is equal ...
And since its main stat, that we are talking about, its most likely it will be at least 16 ... meaning their chance to hit is allready higher ...
And that only apply if they dont have negative modifier in Strength ... if they do, their chance was higher allready better with 14 ...
The only classes that benefits from high Strength are: Fighter, Barbarian, Paladin and potentialy Cleric ...
Fighter, Barbarian and Paladin allready have Simple and Martial weapons ... two proficiencies on same type of weapon have no benefit, so this brings nothing to them.
That leaves us with Cleric ...
Some subclasses for Clerics alow them to wear heavy armor, so those Clerics only need Wisdom for spellcasting, and Constitution for concentration and HP.
Meaning there is nothing holding them back from showing some love to Strength score.
Clerics also have Simple Weapons porificiency only ... so this gives them option to use more weapons effectively, presuming they invested to Strength.
I still dont understand why cant we change Race for our hirelings.

Lets us play Githyanki as racist as they trully are!