Well don't take it too hard on you, it's just that there are things that aren't easy to understand for others, for example think about fetishes for a second, one person may have a foot fetish and another one will call it gross, the one that doesn't have the fetish will never understand the one who has it. The most that you can do is just to respect other people opinnions and that's it.
I have played games with both female and male MC's, personally I prefer having a male MC however I can understand that others like to be the female MC, but someone who only plays games that he is a male MC would find it hard to understand. The optimal thing in those situations is just respect each other and don't try to continue the argument.