Are you saying that "un-conversions" are impossible, given the power of the god you believe in?
If so, how does the reality that it happens enable you to still believe in the power of that god?
You've brought this up in other threads too, and I want to say something about it here as well:
The main reason why some of us think that some people who identify themselves as "ex-Christians" or "former theists" never really believed in God, why they never really deconverted because they never really were converts to begin with, is based on how they describe their past situation, their past beliefs.
The way most people whom I've heard of or read from who now identify themselves as "former believers," "former theists" and such talk about their past beliefs - I would generally qualify their past beliefs as fanatic, as cultist. I really don't think that fanaticism and cultism are to be counted as religiosity or theism. Someone who de-converted from fanaticism or from cultism has not de-converted from religiosity.
To be clear, this is not to say that a particular religious organization is fanatic or cultist. Within the same organization, there are some people who are normal, ordinary believers, and some who are fanatic, cultist. Fanaticism, cultism are attitudes of a particular person, not necessarily of a religious organization.
Simply joining - or leaving - a particular religious organization does not amount to conversion - or deconversion. To think it does is incredibly shallow. To think so also goes against the doctrines of some religious organizations; a notable example is Catholicism where to be counted as a member of the church before God, a person doesn't even need to be baptized into the Catholic church.
I'll believe that genuine deconversion is possible once I find someone who really was a genuine believer, and not just a neurotic, a cultist, a fanatic, or someone who simply was part of a religious organization because their family was too.
And you'll probably object that I am retroactively raising the bar. I'm not. If you visit a religious organization, at any point in time you can find a variety of people there, who are at different levels, who are there for different reasons. And just because they are formally members of said religious organizations, doesn't automatically say much about the actual state of their faith/belief. In fact, in some religious traditions, you can find explicit warnings to the effect that there may be people present in a religious organization who seem to be members, but actually aren't.