1. I don't believe the narrative that women lose interest in sex after they have kids. This is obviously an attraction problem and not an age thing.
2. I don't believe his having a better attitude will change anything. Honestly if a woman is attracted to you, you can be a total dick and she will still want to have sex with you. It's obviously not an attitude thing, its an attraction thing.
1. It's a major cultural trope - I do agree there is a slow down due to less sleep when a baby wakes up the parents frequently at night. Most women are not that interested in sex the first 6 months after birth. I do agree that a guy who is doing things to maintain attraction will have a hell of a lot less problems however. (Not really disagreeing per se, I just see the situation as nuanced.)
2. Attitude is a pretty vague term and I can see how you disagree with me, but I think we're interpreting the word in different ways. A guy quite clearly has the right attitude that I'm talking about if his woman is attracted to him and having lots of sex with him. And yes, when you're charismatic and attractive to a woman you get away with a lot more egregious behavior than if you're not. I never said otherwise.
This overview video by Athol Kay breaks it down
So zamfir112has mentioned that he's fixed Steps 1 and 2, (and likely step 5) but quite clearly not 3 and 4, since he's not getting laid.