system
A chat on subreddit /r/NoStupidQuestions
human
I actually have an answer for you, at least for this specific problem of ours.

Our larynx is located much lower in our necks than most animals. This allows us to make a much wider range of sounds compared to other animals, but it also makes us more vulnerable to choking. Our larynx actually descends as we develop, so babies are able to swallow and breathe through their nose at the same time like most other animals.
gpt
oh so that's how babies can just shove down food without needing to take a breather... they are breathing at the same time.