? In I and V at least they had the highest damage (and hit twice per turn) and could heal themselves. They also had the "Kick" ability which dealt less damage, but to all enemies.
Don't remember MONKS healing anyone else in the party, though.
You know... I might be happy if each Class gets its own version of each role as a unique job.
IE Each Weapon class gets a Tank, Healer/Buffer, DD, Debuff/Subvert,
Gladiator gets Paladin, Dancer, Soldier, Redmage, Thief
Pugilist gets Monk, White Monk, Berserker, Black Belt
Archer gets Sniper, Corsair, Ranger, Engineer
Marauder gets Warrior, Cleric, Viking, Dark Knight
Lancer Gets Dragoon, Holy Dragoon, Samurai, Blue Mage
etc.
But even then you have jobs that are using weapons that are not normal for them except in one instance in past FF's and I'd still be upset that I can't use my favorite weapon with my favorite job.