The question really answers itself. You are essentially asking why are bum men engaging in bum-like behavior. Because that's who they are. The real question is how are these men able to get to the women and have kids in the first plac.
Swag and a dikk game makes these women
They written books about Tupac-like dudes, filled with pointless sex that make these women about being with a bum nikka that lives out that fantasy