And at any point they can and very often do reject that training and adopt or develop their own preferred alternative. They may keep this to themselves, or they may not, depending on the individual and their circumstances, but no one is being enslaved by any ideology that they aren't agreeing to be enslaved by. And as we are all selfish by nature, we aren't going to agree to an ideology that doesn't serve us.
Once we understand this, we will also understand that we create our religions, they do not create us.
Even children will reject ideas that do not show themselves to be true in their experience if reality. This whole forced indictrination angle just doesn't hunt.
Children really don't have any choice to reject anything their parents force on them until they're legally adults.
And even for adults, it's not entirely true that "at any point they can...reject that training." I do agree that people have been more free to do that in recent decades, which is why we're seeing more people reject religion. But in the past, that was simply not an option (Christian prayer in school was still the law of the land until 1962). Your point in post #215 suggested that the belief in a higher power serves humanity sufficiently to "keep us believing it." That's what I've been taking issue with.
My point is that the reason people kept believing it for thousands of years is because they were forced to, and now, in these past few years, they've finally gotten the freedom to reject it, they're doing so in droves, exiting the churches and rejecting theocratic principles. So, whatever power exists to keep people believing in a higher power is obviously waning.
If religion can't count on the power of government to force people to believe, then they'll count on parental authority to condition their children to believe (and there are some horrific stories of child abuse by parents who believed they were acting in accordance with God's will). But if there are more educated, intelligent, liberal, progressive, and tolerant parents out there, then they'll likely allow children to make their own choices and won't force them to go to church if they don't want to. That will further reduce church attendance and the overall adherence to religion.
The problem was never religion. The problem has always been the human desire for control over our own fate, and our willingness to sacrifice almost anything, including each other, to get as much control as we can. Religion was just one of many mechanisms people have used to get and hold onto as much control over their world and everyone in it as they could (including even the illusion of control). Blaming religion is just blaming one of the symptoms, while missing the real problem.
Religion is a useful political tool to keep the masses in line, in order to condition people towards conformity and compliance. That's why a major hurdle was overcome when Western societies started practicing various liberal principles which included freedom of religion. Prior to that, for all intents and purposes, the state was the religion and the religion was the state.
Even in pre-Christian Rome, their leaders and aristocrats were said to have descended from the Gods, so when faced with that kind of power, what's a lowly pleb to do? That's the illusion religion brings about. "If you challenge our government, you're challenging God(s)." The opiate of the masses which keeps them compliant.