Psi: What's the inner astral for?

[Gef]

At great penalty, and a slight fatigue cost, you can go there. The same penalty applies when coming back, and if you fail, you die. Or you can be killed by the bizarre denizens, which may come from your own head. So why would you want to go in the first place?

Sure, it's a cool place to have weird adventures, but the PC needs to have motivation. Am I missing something? Psi-Tech gives one reason, to get around astral barriers, which sounds practical, and Psionic Powers gives another, a vague hope of finding answers to questions, with no particular mechanic. Are there other benefits? Can you enter the inner astral from Idaho, emerge in the outer astral vicinity of Los Angeles? If the answer depends on what the GM does with it, I'd be interesting in hearing what other GMs have done.

Thank you,

GEF