My take is, yes, partly. I believe this song is about Maynard feeling divided by two aspects of his life: the rock star life that has made him wealthy and (reluctantly) famous, and the relatively quiet life of a winemaker and family guy which he refers to as "my peace of my, my home, my center". He wants the latter all the time (who wouldn't?), but he needs the former to support it. He can't have one without the other, so he has to balance the two. "Damn my eyes if they should compromise our fulcrum [balance]. If wants [peace, happiness] and needs [rock star money] divide me then I might as well be gone."

The "Shine On" section has a double meaning. On the surface, he could be talking about grafting grapevines. "Shine down upon the severed, shine until the two become one." He's using that as a metaphor for reconciling the two conflicting halves of his life. Then Maynard meditates with his grapes: "breathe in union, so as one survive another day and season."

"Legion" refers to all those people who want a piece of him and disrupt the quiet side of his life, including (but not limited to) pushy, impatient Tool fans. Not all of us, just the assholes who don't respect his space and privacy.

The title, "Jambi" is a red herring. A throwaway reference to the "wishes" in the first verse and a bit of a joke about the urban legend that he was a cast member on Pee-wee's Playhouse. It's probably meant to distract us from the seriousness and deeply personal nature of the lyrics.