Yes, I've been down that psychic rabbit-hole too. Like anyone, I can set up mental simulations of many people I've never even met, and with enough time, become convinced they're real, as happened when I was converted.
That's just not true. Science indicates there never was a time when the world was good, when the lion lay down with the lamb, and there never will (or should) be. It was simple and became complicated; that's the arrow of time; it's not a description of a process of corruption, which monotheists call sin. The idea of the fall is the most pernicious evil ever to befall humankind, immensely damaging to societies and individuals alike. The attempt to recreate or return to a situation that never did and never can exist is a total waste of time and effort. We must look forward to what can be, not backward.
Christianity moreover almost totally destroyed science, as known to the Greeks and Romans, and it was left to the Muslims to preserve and extend it. Seriously - Europe had even forgotten how to build arches! Europe only rediscovered science in the 12th century or so, for example when the great library of Toledo was opened and found to be full of books in a Latin from which 50% of the words, and 95% of the concepts had been lost. The universities were founded upon the attempt to re-learn the knowledge of the ancients - and even that was only possible because religious authority (and even royal authority) was beginning to be questioned.
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The relevance? Oh, I see, your ideology doesn't allow you to conceive of of a person who has lived inside the kind of loving Xian community you do, and who has now left and is adamantly opposed to their conception of truth, who is not also eaten up by guilt, loathing and spiteful thoughts - but is instead happy, productive, well-adjusted, and leading a highly ethical life. I suppose I should feel offended by your prejudice, but I've worn those blinkers too. Now I just feel mellow about it. It was a happy time with good sincere people, even though their lives were being sapped by trying to re-create an unreality.
Sorry your barbs didn't stick. I've been where you are, spent years in many different kinds of Christian communities and experienced all they had to offer, and now I'm profoundly sure that you're wrong. I'm not bitter at all, though I do think my time might have been better spent elsewhere. It's not that I'm an atheist; I'm far from that confident. It's just that the ideas of theism don't and cannot answer any question I care about.
Anyhow, this isn't really the place to continue this discussion. I also have written more on the subject, elsewhere, though I don't publish much of it.