1) It is really tempting to try to understand ourselves based on the assumed lives of our evolutionary ancestors, but the fact is we know almost nothing about their lives, and conclusions we draw from what we can guess are unlikely to be accurate.
2) There is not one citation in this entire article. This is all opinion, no matter how true it sounds.
3) He offers medical advice based solely on his personal experience. Sleep apnea may not be the same to all people.