As any opinion it is just worth whatever peanuts any other opinion is;
Not all opinions are created equally. Your opinion might be valid from your perspective, while others' opinions might be based upon greater experience, training, evidence and logic. Your qualifing statement, right off the bat, belies your own sense of insecurity or arrogance (hard to determine which, if not both).
Your focus on it here "sounds" like self gratification and virtue signalling.
Like any other betrayed spouse or partner reeling from the severe emotional and psychological trauma brought about by the betrayal of infidelity, he is struggling with a perfectly natural and normal existential crisis. Most of us struggle with a profound injury to our sense of self-worth. And while you may be correct that it is self-gratifying to reassure ourselves that nothing we ever did or didn't do, nothing we ever said or didn't say, warranted the betrayals, you compound the error with the egregious accusation that he's merely "virtue signalling" - as if the very real and valid feelings of dehumanization requires external validation from strangers on the internet. I don't care one way or another how virtuous a betrayed spouse might be - not all betrayed spouses are saints - there is no justification for infidelity. None. Zip. Nada.
In the place of your wife I would think my husband likes to feel superior to. Your writing it out here says to me that you are in a self protective state.
My peanuts worthy opinion sees this as your own self-protection; a refusal to accept that infidelity demonstrates inferior morals, ethics and virtue.
Your wife's why is essential knowledge for her. It will be very useful knowledge you because your relationship was a dynamic that you participated in.
This is some truly blame-shifting nonsense. His WW's whys have absolutely nothing to do with their relationship dynamics any more than your infidelity can be righteously blamed on your relationship dynamics with the husband you betrayed.
Example: Wife: I lied to you over the years about my sexual feelings towards other men because early on in our relationship you blocked a discussion because of your own lack of desire to hear (due to your insecurities). Her why is now useful information for you even if you seek another relationship because it tells you something useful about yourself; you were not safe.
You justify dishonesty. You justify infidelity. You shift the blame. It's wayward thinking from start to finish and not even worth a handful of peanuts.
The only way to get enlightened in relationships is to immerse ourselves in the other person's view.
No, it isn't. This isn’t the only way to get "enlightened" in relationships. Internalizing other people's issues is as precarious as refusing to protect ourselves from the damage serial cheaters are capable of inflicting.
Married 2005
D-Day April, 2015
Divorced May, 2022
"The Universe is not short on wake-up calls. We're just quick to hit the snooze button." -Brene Brown