Humans were a lot smaller just 150 years ago. I went to a museum at mass general hospital called the ether dome. It is an actual OR from the 1800s (the first one that used anesthesia, ether)…. Many of the doors around were from around then. Very small…. Also the chairs were so small. Go to Fenway park and you’ll see the seats weren’t meant for modern people either (not a fat joke)