FF4 has a giant mech-dungeon you climb in.
FF6 has a knight a monk and a thief face off against a tank. One of the people on team Hero is a Yeti.
I mean, FF7 literally has characters wearing armor (Jesse) and people in sunglasses and tailored suits. One of team hero is a mechanized mascot being operated by some dude in a cubicle..somewhere.
FF10 has a girl in a bikini top hanging with a literal samurai in sunglasses.
You would be hard pressed to find a Final Fantasy game that DOESN'T mix modern with "ye olde fantasy". And even then, it's more a matter of pixels not showing detail.
You don't have to like it, and that is fine, but even a Hawaiian shirt is hardly out of place.
One of the newest titles, Stranger in Paradise, literally has the main character in a button up t-shirt standing with a friend in armor. There are even zippers.
Or alternatively, sailor uniform back-flap.
