why are all healers "casters"

[Shurrikhan]

better question, do we really need mp when we've done away with tp?

I don't care what it's called, but I'd like to see a resource still be used. It allows for more means of generating urgency and compromise, deliberate action or gambles, and flexible breakpoints.

[StarRosie]

Melee healer! Get over here so I can punch the health into you!

But real talk, because some fights in game would make melee or close quarters healers a very dangerous thing to the party. Example, Ifrit has a specific attack that targets the healer and makes them give off shockwaves with knockback. So this would require a melee or close quarters healer to completely remove itself from the fight until the mechanic is clear or they'd be a big hindrance to the party. There are also a lot of other examples, but I can't think of or list them all right now cause I'm dead tired...