Why are people assuming if it's a healer, it must shoot the person?

Um HELLO did no one play Final Fantasy Tactics, one of the best final fantasy's out there with one of the best job systems?

Chemist says hello.

I can imagine its heals to be some basic cast times, and what sets it apart is it has various instant cast heals where they are throwing their potions. They might even have more AoE based heals on the floor that HoT. They can do a lot with Chemist.