Why is there no job with rogue as a secondary class?

[EpicOreo80]

Caster having NIN x-class would not only be odd, but would be mostly impractical anyway.
Healers having NIN x-class would be even weirder. Not that any of them would want it, since CNJ, THM and ACN skills are rather indispensable to them.
Shadeshift and Goad would be amazing for tanks, but I doubt SE would straight up buff all 3 of em like that.

I agree that it would be odd for a caster or healer to have rogue as a cross-class.
I just hope that in the future they make a class that has rogue cross-class abilities.
I feel like not having any other jobs with rogue as a secondary class may keep some people from creating a NIN because they won't have any other jobs that use rogue.