Ask your wife if she thinks that actresses should get less work than actors because the jobs are not made available for women.
She's buying tickets to the movies that you are complaining about. So obviously she is okay with it, because its entertainment.
Context is key. Ask the question and see what she says.
Most of the women I know don't even think about it at all but when asked the question they agree that actresses should get more roles. If your wife doesn't feel that way, I'd be very interested to know her reasons.