Hey bud, good to talk to you!
Does it really have to be about death or could it be more about obligations and responsibility?
A work of literature, particularly a poem, doesn't "have to be" about anything that's not specifically contained in the text. All metaphorical interpretations are part of the personal interaction between the writer and the reader that makes literature different from news reportage or Twitter posts.
It can be about anything you want, just don't slip into the deconstructionist bog, or I'll have to send somebody to get you out.
For example, stanza one: the woods belong to God and the house is a church.