Hi Sadhak:
Yes, for many, self-inquiry is a mind swamp full of mosquitoes, quicksand and alligators. No place to stand except on egoic suppositions, which will take us on wild goose chases through the swamp every time.
Real self-inquiry is beyond all that. It rests in our silence, which means the entire process depends on something that came before, another method, deep meditation, which brings about the rise of the witness. That is the thing, you know. Either that, or the witness is present already (via previous efforts), a la Tolle, Katie and others who wake up one day like that, and they tell us all about how to take it from there, from their waking-up point. Well, fine, but from where is that?! So we end up genuflecting at the altar of their mysterious condition -- a condition we could easily cultivate for ourselves, if only we knew how. Meditate!
Just as you say, without inner silence it is pretty fuzzy. But look what happens with some simple inner silence creeping up. Shanti manages a stage production without even trying. Bravo! Stillness in action! Encore!
So what do we need self-inquiry for? Well, for the same reason we need bhakti. These things will move us forward if taken to our deepest levels in stillness. Besides making the day (between the meditations) much more interesting, these processes give us understanding and perspective on the gift within us. More than that -- they give us
energetic stillness, alive and moving outward from us into the world. There is no doubt we can make better use of our stillness if we learn a few good methods (or non-methods), and self-inquiry is about that.
Stillness blends with mind, emotions and ecstasy, and that is the process of enlightenment going forward. It is an automatic process. There is little we have to do but let go into what we are, once we experience that we are That ... all the strategies are for That. Enter Tolle, Katie, Ramana Maharishi, et al. Until then, it is all a big fuzz, a mind swamp. Inner silence is our boat. Let's arrange for the boat before we go too far into the swamp. It is common sense...
The guru is in you.