Seems pretty easy to me. Just because Buffy said "I think I was in Heaven" doesn't mean she was in the Christian Heaven or that she was in a place run by the "one true God." For all we know she was in Slayer Heaven, where all Slayers go when they die. There could be lots of different Heaven dimensions.
I was actually referring more to how such dimensions, which in Judeo-Christian mythology are created by God for specific purposes, would come about naturally . I suppose demon dimensions could be the homes of demons but is a paradise dimension the creation of a benevolent superbeing?
God isn''t benevolent.
"Put up with my shit without complaining, and maybe I'll treat you right after you die... No, that's a lie generated by popular culture. What the actual promise is, is that you'll lay in your grave rotting for thousands of years till doomsday and then he'll bring you back to life and raise you to heaven IF he thinks you're good enough, and if you're not you can just wander about as a rotting zombie."
There's no proof that god isn't shitting with us or dicking us around until the end of the world shows up, that some super beings like the Ori can't pony the same long con to get surf labour and mindless obedience in exchange for a wisp of gullibility.
Buffy got heaven immediately.
Such a better deal.
And not even a deal.
She just lucked into it.
(She was probably in fridge or a cooler, used to store souls before gods or demons ate her. I mean if cattle are too stupid not to know the slaughter is coming, being incredibly happy is about the only warning we get,)
Meanwhile there's every chance that man is going to kill himself to the last before god gets up off his ass and kicks off the rapture to separate the pious from the assholes.
Although depending on how you read it, if you're a Jehovah's Witness, only 144,000 thousand people since origin are going to be saved and go to heaven, a Methodist friend was saying that that was rubbish, and that the "sealed" ones are just special servants for god and of course every one else is going to be saved too.
Such dissension.
Although I had a 17 year old Mormon door knocker telling me that the end of days had started because of all the bad things in the news she saw every night.
She, like worked it out, all by herself.
Smart cookie.