Why is this still so relevant among educated people ?

So , I was talking to a girl about the use of tampons and menstrual cups and she mentioned that only non virgins should use it , because her mom told her that if anything happens to her hymen , no one would marry her . Now I understand that this is a raging issue still , but what surprised me was that her mom is well educated , employed as a teacher and she herself is a post grad student at a top institution , and yet their thinking is so regressive .

While I also understand that the question of virginity of a girl is considered very " important " while scouting for marriage , but what is the point of judging other people for how they choose to lead their lives , especially women who aren't coy and shy . Like I remember one time my aunt said that male gynaecs are better than female ones , what absolute trash statement .