Why would some girls leave their boyfriends for not getting violent unless he had no other option, even if he is a trained fighter? Could it be media?

Happened to friend of mine, maybe he had nothing else going for him and was boring I don't know. But several girls would get real turned on by past mma experience, and even have sex on night of first date. Eventually they would at some point leave just cause he ran into a few assholes along the way and wouldn’t get violent unless he had no other option. This is all what he told me. I know girls like guys who can protect them and that’s fine, but some are this extreme? Could it be the media or just a bad upbringing? I will also note that these girls are in their early to mid 20s.
Why would some girls leave their boyfriends for not getting violent unless he had no other option, even if he is a trained fighter? Could it be media?
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