I disagree, but let's accept it as true for the sake of argument. This is civilization. The question is, is it still right and good? Being born into civilization automatically makes you indebted towards it, because of all its affordances?

I think that's morally wrong, and I don't like this attitude as a matter of principle.

Each of us is born into some structure that human animals impose. Some groups afford more or less ability to individuals to contribute (e.g. by voting, putting themselves forward as potential leaders, etc.) to a discussion about whether the existing structures are appropriate. Couching it in moral terms isn't interesting, from a practical perspective.

I don't really get your argument here. Are you sure it's not an thinly-veiled is-ought argument?

Moral terms shape politics, politics shape laws, laws shape civilizations. How can you say they're not interesting?

Of course there have been lots of societies that put people in their place with no social mobility, which has the benefit of not burdening them with the choice of what to do with their lives. This is very practical, but it's immoral - from my point of view.

Luckily, we don't live in one of these societies, but maintaining that "privileged" status doesn't come for free. That's why I don't like your attitude, I am worried you will make extremely poor political decisions because of it.