What is the difference between motion graphics and VFX?
Motion graphics are designed. They are built from type, shape, and color, and they exist to carry information the footage cannot: a name, a number, a product feature, a brand mark resolving at the end.
Visual effects are photographic. They start from what the camera recorded and alter it, whether that is removing something that should not be in frame, extending a set, or compositing separate plates into one shot. Different craft, different people, usually the same timeline.