Dating a high value/alpha male takes work and maintenance. Even if the guy is a simp, the girl knows that she can be replaced at any given moment. If she has an insecurity issue, then this will constantly wear down on her. Last, she always has to be on her best behavior to keep this guy happy. Women today are allowed to be more dominant and masculine today, so this common viewpoint that ALL women want to be submissive housewives is outdated and stupid tbh.
With a beta male, she doesn't have to worry about constantly competing with other girls, she doesn't have to maintain a certain attraction level and can let herself go a little, she can have a pvss poor attitude and boss him around a lot.