Jason, English has an enormous number of words, as you will be aware, more than the next two biggest languages together, and getting larger every day.
A poet or songwriter is often using the language as an art-form, saying something in a beautiful and artistic way, or sometimes like Tom Lehrer, in a sarcastic or bitter or humourous way.(Any combination of the three.)
Sometimes, blunt language is used because the song or poem has a message that the writer and performer wants no mistake about.

I've sometimes said to people from China who are studying English that we use the language as an art-form, just as they use beautiful handwriting in an artistic way.
I hope that you have the free WordWeb dictionary on your computer.