How the fuck do marriage counselors justify blaming the husband for the wife's infidelity?

Seriously it makes no sense. She tried to tell me that because I refused an open marriage, that her cheating was my fault. I asked "is it my fault if I cheat?" the counselor responded that yes any time a man cheats its his fault.. I said " so it's my fault if I cheat and my fault if she cheats?" she Said because women have no traditional power, it's always the man's fault if she cheats as well" I called her a worthless fucking feminist, and told my soon to be x wife that it's not that hard to keep her legs closed. Fucking unreal. I told them both to fuck them selves and I was done with counseling.
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Just an FYI, I never, not once, was abusive, nor did I cheat. I could never hurt someone like that.
How the fuck do marriage counselors justify blaming the husband for the wife's infidelity?
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