>I don't even understand [...]

>It is not different from groceries.

Do you appreciate that, in the wider historical context, this position is an exceptionally radical one? You seem to not understand how there could even exist a difference of opinion on this, but I'm confident that this outlook of humans as being completely fungible, transactional economic units would appear unthinkable to anyone throughout 99% of human history. Just the suggestion that a nation's population should be restocked by swapping it out with another nation's population would be tantamount to treason any time prior to the revolution of the 1960s.