Why do humans use such confusing terms such as dawn, dusk, twilight, etc.? What's wrong with just day or night???

People have this whole thing about waxing poetic; they think if they have a dozen words to describe one thing it makes them seem clever and artistic. I don't think they realize it just kinda makes them seem a little bit lame. Instead of "Into the twilight did I roam" really sounds better as "Yo, I went outside. It was almost dark." They just don't get it...