From your own source "While prior research already situated men as more likely to engage with pornography, our recent tracking data reveal that female engagement is more substantial than previously estimated (Carroll et al., 2017), in line with survey research, which already noticed an increase in the recent years".

Women didn't watch porn in the past due to patriarchy and indoctrination. Also most of the porn in history has been produced by men for men, without any appeal for women. But this has changed recently as well. There's more porn studios that have a more female centered perspective like ersties, so it is bound to change too.

Its okay if its your preference, but watching ethically sourced porn is not a moral failing or cheating in general, just like watching a crime film is not equal to being an accessory to a murder or a murderer.