If we're being honest GOOD stepfathers are doing a big service to the community at large by molding better men. They should be given props to be honest rather than clowned but on the other hand the fact they even need to exist in the first place is an issue. Why is the biological father if alive not being shamed into taking care of his kids? Why is the mother choosing irresponsible men? All this looks based choosing is an issue we don't wanna address...
So like these biological father's friends and family? Birds of a feather I imagine. Most people hang with similar or like minded people. If he's not active in his kids life, i imagine is friends aren't either and then family would be somewhat paradoxical because if he's around his family he's not an absentee father.
This is a politically incorrect answer and larger factor than people account for or give weight to.True they probably cut off or limit contact with the people who will get on them about that. Or they don't hold themselves accountable and blame it on someone else. I know there's actual cases where the mother keeps the child from the father but I'm talking actual deadbeats.
We also gotta discuss the women who keep the father out their children's lives to actively spite them as well