There's really no point in having children if you're not going to be home enough to father them.
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.
I think at the beginning of a project, you decide if you're in love with the idea and what it's about, or what you think it's about at that time at least. Then you commit to it, and once you've commit to it no matter what, no matter how many self doubts you have, you're in it. The ship's sailed, you