I don't buy it. Dwayne Johnson one the highest-grossing and highest-paid actors of the 10s is bald. Along him you have a host of action actors that are bald. Top tv shows like Lost and Breaking Bad featured bald main characters. Just to name a few.
Dwayne Johnson was bald by the time he started acting, probably due to steroid use.
I wonder how Jeff Bezos is doing these days.
Radio, television, and finally internet and smartphones made things progressively worse in this regard.