I also agree basically; any Mafioso makes a decision to embroil himself in that life. As TB points out, Michael made that decision several times.

Pete, I think you're onto something. Vito did his best ("his", in that life he chose) to take care of his family while Michael destroyed it.

"Generosity. That was my first mistake."
"Experience must be our only guide; reason may mislead us."
"Instagram is Twitter for people who can't read."