I can see how choosing a primary c/s would bring a feeling of control to a woman who cannot tolerate the sense of submission and violation that the management of a typical hospital vaginal birth can bring... and I also understand feeling that way about ERC. I think that the "empowerment" part of an ERC is simply the difference between making a choice and having no choice. When it becomes unacceptable in a woman's mind to risk enduring again the violation of being pressured, lied to, being left uninformed, coerced and sometimes even acted on without consent at all, then having the control of making a choice that is honored can be a really big deal.
One of the most valuable things my awesome therapist told me ages ago was that regardless of the info a person is aware of, they will do what they are able to at the time. We are all at our own place on our path, and we do what we can. If psychologically we could make a different choice, we would. It's not productive to look at women who are at places on the path we may have travelled already, and rant about how wrong they are. It might be productive to simply tell our stories about how we moved from that place on the path, and let it go.
At the same time, I believe women are not getting the full picture from their care providers and that needs to change. Also, we need to resume the chain of support and information about normal birth that has been lost over the generations of medically managed birth. Preparing the next generations to claim and insist on normal birth is probably one of the most effective things we can do to bring the pendulum back to center.
My response to the "too posh to push" set is not to rail against them, but to point to the circumstances that led them to that place as the real problem. It seems to me that women choosing c/s as a way of claiming control over birth only makes glaringly, horribly clear that women have a sense of how badly their rights are trampled in the medical model of obstetrical care but don't know any other way to regain their control of the situation. Almost like a hostage who begins to side with their captors in order to be able to regain a sense of control of the impossible situation they are in.