It affects how people she knows see her. Your parents, for example, will always have the issues you discussed with them in their head when they interact with her, and she knows they do, and they know that she knows.

Because it is your private issues with your wife. This is something between you and her. She doesn't want her business all over town with people knowing what's going on behind closed doors.

Think of it this way, if you couldn't have sex with her because your penis didn't work, would you want her sharing it with anyone who would listen?

Maybe that way you can understand

If not you are being purposely obtuse.