Don't get me wrong, I'm very much a promoter of monogamy.
I think it is naive to assume that such public statements are the whole truth of a matter.
People who fuck up a company (or have an affair, or get caught snorting drugs off a sex-worker) aren't really 'stepping back to spend more time with their families'. Historically the classic example of executive public statements.
If you have stronger evidence that the statement was untruthful when it said he hurt his family, you may present it.
Until such time, the statement only strengthens the bayesian prior, which is that his affairs hurt his family, and that is what we can conclude.
Yes, and it would have helped. These are entirely different stories:
"My wife and I have a non-traditional relationship and would prefer to keep the specifics private, but no harm was caused by my actions."
"I was unfaithful to my wife. My actions hurt her and our children. There is no excuse for what I did. I am deeply sorry."