Putting a very young child to sleep in a different bed in a different room seems like one of those modern Western civilization things that makes no sense when s

Putting a very young child to sleep in a different bed in a different room seems like one of those modern Western civilization things that makes no sense when scrutinized even a little. Like hiding nipples or cutting off bits of penises. Is it really still the norm to place the baby in another room and then go tend to them when they cry?