We can all sit here and reason that as long as it's not harming anyone then these kind of behaviors are okay. The reality is that our behaviors dictate culture, and in this specific case the interactions between men and women. There is no reason why a woman with her physical looks and I'm assuming feminine personality can't attract a successful and wealthy man to to fully commit to her instead of treating her like a high-end prostitute.
When women willingly engage in this type of dynamic, they do indirectly harm other women in relationships or those wanting a committed, monogamous relationship. They are offering up an alternative lifestyle where men have no accountability, view women as expendable, and have no sense of urgency to settle down and enter marriage. This results in a society with higher crimes, fractured families, and so forth. There will be a break down in society. I won't go into detail right now as to why having married men makes society safer and better, but statistics do support that single men with no responsibiliti es are more likely to commit heinous crimes, such as: rape, murder, etc.