It's like the symbol for rain being a "raindrop" that's shaped like a teardrop: Bulbous bottom, with a top that tapers to a point, which is manifestly not the shape rain takes in the air.

https://gpm.nasa.gov/education/articles/shape-of-a-raindrop

Iconography is a language, and terms in a language aren't usually exact representations of what they stand for.