You may be interested to read that the Why We Sleep guy committed research misconduct in the book. Guy is totally unrepentant about it.
https://statmodeling.stat.columbia.edu/2020/03/24/why-we-sle...
https://statmodeling.stat.columbia.edu/2020/03/24/why-we-sle...
Misconduct is probably overstating it, and he wrote a popular book, which increased awareness of sleep health.