You said it yourself. There are a number of things it can do. Its prescribed for other medical reasons. Its also not available at Wal Mart over the counter like Condoms are. The condom comparison needs to stop lol. If you want to use condoms as a reason why then I can flip that argument and say shes getting birth control...it better benefits both parties involved in intercourse.
It should be over the counter, I'm completely in favor of that.