What's with people saying Yokai-Watch looks out of place?

[Causality]

You're missing the point, entirely.
It's like watching game of thrones, and people fight with donald duck themed swords. Or imagine 2 armies clashing and everyone shouting YOLOOOOO; YASS QUEEN, SHAADE.
Those machines aren't out of place - old civilizations with machines, is common theme in most FF games (actually can't think of a single FF game without machines) Garlemald military is almost entirely based on allagh tech. Binding Coil is all machine, alexander is all machine, void ark is all machine, azys is a huge floating mechanical fortress! putting some machine from another FF game, into this FF game, isn't "out of place"

or People Fighting Bahamut with weapons that have rainbow music notes and moogles on them.... OH wait!