Posh
I absolutely agree that AA is not the only way and that it doesn't work for everyone.
However, in answer to your specific questions, I would suggest that anyone who was not powerless would not have a drinking problem. They would recognise the issue and then use their own "power" to stop or moderate. The very fact that someone is sitting in an AA room is a fair indication that, in that aspect of life if nowhere else, he or she is powerless.
As to the higher power - again, turning up to AA is an initial admission of this. The unhappy alcoholic thinks that perhaps a group of ex-drunks can help with his or her own problem. Right there is an example of "a power greater than yourself." Another, perfectly valid, interpretation of the higher power is your subconscious. You cannot control it and it can make you do things you did not consciously plan to do. You are certainly under no obligation to make your higher power anything mystical, still less overtly religious. Also, most alcoholics soon see that they had a very powerful "higher power" in their lives, called, variously, Stella, Johnny walker, Gordon, K or even Champagne!
It is a massive misconception that we sit around talking endlessly about drinking. The further away from a drink one is, the less one tends to talk about it. It is important to remember what life was like in the old days, but it need not explicitly be discussed. (The exception is when a newcomer is present, when we tend to talk more about the old days so that the newcomer can see we used to be the same when we first came in as they are now.)
What we do discuss is how we handle life without a drink - eg bad news used to "make" me drink. I still get bad news on a regular basis, but a drink is no longer an option - how do I cope without it? I share my experience with others and they share back with me, and together we stay sober.
So there you have it - the shocking truth about AA ... Still agree it's not for everyone but nor is it exactly as it's sometimes imagined.