Dress up? OK, I’ll accept that as an idea for a mask, similar to the Kachina masks, but why are the drawings of the human figures so disproportionate physically when the animals aren’t? It just makes no sense to draw something so different from the normal human physique.
You’d have to posit that the dress up includes using stilts under long robes to give that long torso and thin legs.
Or I suppose it could be different artists, one with skills and one without.
Pharaohs are portrayed as much taller than others in Egyptian art — that doesn’t mean they were literally giants.