I agree with you about most of this. And I applaud you that you have worked your way to a similar end. But I don't read into Tolle's work that we have to eschew everything to live in peace in the "now", but rather that learning how to live in the now without expectations or judgements can help unclutter our minds and our lives so we can set truly effective goals - and reach them, love deeper and without condition or expectation of anything in return, and experience true hope, not just the hope of the next thing to come along being better than the past we just experienced. Which is what I think most people equate hope to. I know I did. I think a big part of this for me is that I am relearning what it means to have hope.
I think this can be effective in helping some people, myself included, find that personal "center" you are talking about.
I think the vast majority of us really do not live in the "now" but rather in the past or future, losing out on the happiness that is around us right, well, now. I also like his analogy of this way of living in the past and/or future instead of the "now", and being tied up in thought all the time, as an addiction of sorts. When I first started trying to settle my mind down and really control my thoughts, to be able to observe them as separate entities from myself without judgement or expectation, which I would argue few people really try to do and even fewer develop a real ability to do, it was like an addiction. I went (and still go) through periods of returning to intense thinking and dwelling on past or future concerns that is way beyond what may have been the case for me before I started the exercise. But I also find even those moments to be less disruptive and to create less stress than the state of constantly being in the past or future concerns that I was largely in before.
I think of it like an extinction burst in behavioral conditioning. When you are withholding or removing all reinforcers to eliminate a behavior the subject will almost always go through an extinction burst in which the behavior in question escalates tremendously for a period of time before they are able to actually let it go and the behavior stops. So to me that means, it appears to be working.
And hey this would have been cool in the other thread, this is actually just what I was looking for. And I kinda knew when you got involved it would take it to another level, as you always seem to have a good grasp of this type of topic and something positive to add to the conversation.