- RNG doesn't by virtue of no ranged weapon having that ability.
- NIN doesn't have a multi-hit katana. Those don't exist.
- BLU doesn't have a multi-hit sword.
- PUP doesn't have a multi-hit hand-to-hand weapon.
At least we're not alone. But 2/4 of the above jobs can at least use one multi-hit weapon, even if it's not their highest skill. Same holds true for DNC. So we could be worse off like BLU and PUP.
Actually, PUP does get access to M.Kris. Dagger is PUP's second highest skill (C- as opposed to C for H2H). However, PUP wouldn't ever want to use M.Kris because PUP is a DoT job - building TP with a weak but fast weapon just to use crappy dagger WS is foolish. Makes sense for a COR getting TP with M.Kris to use Slug, or a DNC who would want to gain TP quickly to use dances.
That being said, PUP does get a multihit weapon in one way... If you view it as automaton being PUP's real "main weapon", Coiler is an automaton attachment that gives the automaton double attack - the rate of which is greatly improved with multiple Thunder Maneuvers active (up to about a 40% proc rate).
PUP and COR are my two main jobs, and honestly using Coiler with the ranger automaton and working on spamming Armor Piercer WS as often as possible feels really similar to me to the common COR strategy of building TP with M.Kris or Joyeuse and letting a Slug Shot fly.
By the way, most COR prefer Joyeuse to M.Kris even though COR has higher dagger skill than sword skill. Better damage, and using Suppanomimi helps sword skill. For DNC though, yeah... D sword skill hurts a bit.