Moman,
Found your argument that many who leave the JWs turn to belief in evolution because they want to reject a belief in a controlling god as interesting. It's also the same argument that the WTS used years ago in the first book on evolution. And makes just about as much sense now as it did then.
I have a much simpler explanation, which Jan made quite clear. Evolution is simply a fact of life and science. When you leave the Witnesses and can actually think for yourself on this issue, and you take the time to investigate it, a thinking person simply has to accept the facts.
This really has nothing to do with a god or creator. It's simply an explanation of what IS. Many evolutionists believe in a god, and all the more power to them. Where there is a problem is that many religionists continue to believe the myths of their religion, its stories, as though they were literally facts instead of truths spoken in metaphor. The myths of religion - like the Genesis accounts - when taken literally, simply collapse under the evidence of science.
Perhaps you live where you've been able to watch Bill Moyer's discussions with Joseph Campbell on "The Power of Myth." Where I live it's running right now on PBS. Campbell makes clear how ruinous it is for humanity when religion views it's truths as the only truths, and how foolish for religion to view it's myths as literal.
Why does the evolution/creation debate still live on? Due to the fear of literalists and fundamentalists to take an unbiased view of their beliefs. The ideas of evolution will continue to, well, evolve and expand. Religious fundamentalism will continue to devolve and shrink as more thinking people leave it behind.
S4