You really love to exaggerate don't you?
I have never seen a single person that thinks cheating is worse than mass murder. And I doubt you have seen anyone who says that.
Also we don't say that "The Man Must Be Lying" in your story of your AP and his "awful cold abusive wife that was really more responsible for the affair than you and really a worse person than either you or your AP so you shouldn't feel any guilt whatsoever".
Rather what we've been saying is that YOU DON'T KNOW whether your AP is lying or not about his wife. And so you shouldn't portray his words as "The Truth" especially when it comes to badmouthing a woman you don't actually know. Especially given we already know your AP was a liar in other areas of his life.
Nuance.
I personally agree with you that if you can't have sex in your marriage, and you don't want to change, and your partner isn't asexual, you should be open to polyamory or divorce.
But it's a shame you dress up your articles with so much exaggeration.