It's self-effacing, it's hard-luck, the shtetl stories. All those Coasters things are an amalgam of Yiddish and black humor.
I am the model middle child. I am patient and I like to take care of everyone. Being called nice is a compliment. It's not a boring way to describe me.
The message is not so much that the worms will inherit the Earth, but that all things play a role in nature, even the lowly worm.