The game encourages those looks.

Consider a prime example in the crafting/gathering Custom Deliveries. In Idyllshire you will meet a person who hides behind a gold outfit with a pig's head. In. Game.

In about a little over a week from when this is written, you will meet another person with a 'modern' look. Their outfit is pretty cool.

This game has magic as well as technology built to emulate magic. It is not stuck in the age of King Arthur and His Knights of the Round Table. The sooner the OP acknowledges this, the easier it will be to confirm that, yes, clothing may be traditional for some and, for others, completely modern.

OP is urged to consider some of the Korean F2P MMOs available. Blade and Soul, for example, has a lot of 'fantasy trope' items (as well as what I would call 'fan service trope' items), but you can also wear some exceedingly 21st century clothing instead, if you choose.

The only game I played where 'modern' didn't seem to be a thing was World of Warcraft. I was never enthused by the armor sets, they appeared to be so dark with a small riot of color effects. Or, in BC, they were suddenly a clown-suit's worth of color. Sometimes. Thank heavens there was that one barbarian loincloth that could be used as a male Blood Elf mage.