Every time a supermodel divorces her rock-star husband, the Beta Male secretly rejoices (or more accurately, feels great waves of unjustified hope), and every time a beautiful movie star marries, the Beta Male experiences a sense of lost opportunity. The entire city of Las Vegas - plastic opulence, treasure for the taking, vulgar towers, and cocktail waitresses with improbable breasts - is built on the self-delusion of the Beta Male.
I absolutely agree with you. But I disagree with the comment about capitalization. It's capitalized in the original text - and in this context, these words should be capitalized as they're being used as to represent a formal idea/concept being posited
The concept of alpha/beta males is an antiquated concept that has been debunked. It is nothing more than a lazy excuse to group and judge people on a large scale easily. It is a concept birthed of prejudice.
In addition, neither alpha nor beta should be capitalized.