Well, I’m assuming the majority of people currently alive (and even more of those who have ever lived) are religious, and the majority of religions followed hol

Well, I’m assuming the majority of people currently alive (and even more of those who have ever lived) are religious, and the majority of religions followed hold with the Heaven & Hell / Cycle of Reincarnation until Enlightenment model - and that experience in the afterlife was still recognisably ’human’. Though, saying that, OP’s point about needing a human body to have human experiences may be correct if souls get a new human body in the afterlife - I’d just assumed liberated souls, like ghosts, had no physical form.