Noah is sometimes called the first vintner. Why would Torah give us instructions about removing the products of the grape? Wine production requires an amount of civilization and I don't mean speaking french and knowing which fork to use first at the dinner table, but the societies in which we live. Torah and the story of Jewish people are one of wanders eventually settling. Genesis is full of tales that are possibly metaphors for the struggles between herdsmen and farmers. Yes, Rogers and Hammerstein even wrote a song about it in Oklahoma. If wine and the product of the grape represent a time in Torah, a point in which our relationship with G!d not just each other was different, perhaps the Nazarite is also seeking to return to that time and that relationship? A time before Noah, when the world was less civilized and G!d spoke to us differently than after the flood.
All things change but the One. Even the great storm on planet Jupiter, the terrific red swirling dust storm that generations of humans have seen across the vastness of space will someday end. I think the temporal nature of the commitment was the most important part of the Nazarite's vow. And while it seems strange that Torah includes this as an option for a Jew to undertake, perhaps it is also just reminding us of time and our commitments.
That we need to understand that things, for better and for worse, are temporary.
That making the most of our time is as valuable as setting it aside to any higher purpose.
That perhaps a level of observance that leads us to a higher place is in recognizing the time we have.