If you have never played or been in any of those rolls how could you argue the point so vigorously. You are creating what you believe is reality. Based on a generation of people who don't believe it takes a village to raise a child. There is no much thing as too much love and guidance and it is up to the adults to decide.
I've been in enough and seen enough relationships to know that the shit is nothing like you're pretending it is.
Divorces happen, cheating happens, etc.
You're saying that a man should allow any other man that's dating the mother of his kids to discipline your child any way he wants. That's ridiculous.
If I don't want the nigga the mother of my child is dating to beat on my daughter, then she shouldn't be touched. Period.