I'm not so sure about that.
I have personally seen a couple of marriages break up due to infidelity. In both cases, it was the woman who cheated.
One was a real shock: she came from a devout Christian family, her and her husband had been high school sweethearts, and she always acted like a very conservative, straight-laced lady. It turns out, she was a cheater (caught in the act). My friend left her immediately. At first, her family disowned her; her family and his were very close. After some time, they flipped and took their daughter's side (blood is thicker than water), and started lecturing him about how he needed to be a good Christian and forgive. He remarried, and has been with a good woman for decades now.
I also have a friend who worked for a private detective once. He told me that based on the cases he worked, women definitely cheat more than men.
There’s actual studies on who cheats more and it’s not women.
Anecdotes are not evidence. Female infidelity has increased but still doesn’t match male infildelity. Particularly if you define porn and OF interactions as cheating.