What even is the purpose of all those non melee/blm jobs?

[Tiramu]

Why should i play blm, if it is outclassed by rpr, sam, mnk and drg?
Let's be clear, there are some classes with a slightly steeper learning curve than others, which should have 2-3% more than others just to have that gratification. But currently melee are unjustifiably infinitely stronger than ranged. Why can't I play quietly with double ranged just because ranged is decided to suck? Why does any melee do more damage than a brd for example? There is no valid reason right now.

I dont know the ins and outs of their balancing justifications, but there are clearly 2 groups of jobs, with each all being fairly close to each other. The difference between BLM and RPR is quite small.

The thing with ranged and close combat melee is probably because ranged jobs, provided the player knows mechanics, are less likely to take stuff to the face compared to close melee who generally get hit by stuff more often. Or something like that.