I like the idea about the garden of Eden.
I think it’s pretty obvious to see some parts of the Bible are allegory eg Noah’s ark and other parts just how things were in society at the time eg slavery. I guess as there was no social security, being a slave was how you stayed alive rather than starve? It was how society arranged itself, it was like that pre-Bible so not a Christian thing. It was Christians who pushed for the abolition of slavery (eg William Wilberforce) and they continue to do so now.
Christians have never claimed to be perfect - in my experience it is only atheists who expect them to be so. Jesus always preferred to be with the outcasts and sinners in society - he said they needed him most. He actively disliked the ultra religious Pharisees. Luckily for me you don’t have to be perfect to be a Christian - I am most definitely not.
I have to say though that out of the atheists and Christians that I know it is the Christians that do most for society in general. That’s not to say atheists don’t - that would be obviously wrong, but I find that Christians are actively encouraged to serve others and to tithe, so the majority of them do so; but again in my experience most of my non religious friends (who are about 90% of my friends) do nothing to serve the community.
My church runs the city’s night shelter, the city’s food bank, financial and practically supports an orphanage abroad, runs a counselling service and a debt advisory service, provides a social group and meals for the elderly, runs transport services for elderly and vulnerable, street pastors, toddler groups, give financial support to the desperate, befrienders. Those services all for those outside the church and most people wouldn’t know the church is behind them. Those are the official church services, then most people do things off their own back too eg helping neighbours, volunteering at youth groups, schools, hospitals, village halls, parish councils etc.
Again, I know non religious people do many great things, but in my experience, as they are not actively encouraged to, they do so much less frequently. I also don’t know any atheists who give 10% of their income but most Christians I know do so.
Christianity, in my opinion, brings massive benefits to society.