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

[Ggwppino]

And physical ranged don't have an equivalent, so technically, there is a bit more complexity in that regard.

the physical ranged has to think about the various random procs that happen to him and how to use them in the best way, not having a rotation to learn muscularly. This leads him to pay more attention to the bar and less to the mechanics.