[nonethewiser]

> I'm a light sleeper and I feel like I have an awareness of everything nearby when I'm asleep

You absolutely don't have awareness of everything nearby when you're asleep. You are inherently incapable of even determining this because you're sleeping. I'm sure you react to some stimuli but that doesn't mean you can expect yourself to react to every potential stimuli that you would want to.

[Fire-Dragon-DoL]

A medical professional explained to me that your body gets accustomed to the body presence of the baby and unconsciously react to it: the body is aware. Now of course mother nature experiments with everything, so there are for sure people who don't get this "awareness" and as such, could be dangerous.