This is where I think the Sopranos is much truer to real-life. Like Tony's family most Mafiosi see their membership as a way of part-taking in the American dream...to see that their kids get what they deserve out of the Amnerican Dream by providing for them through ill-gotten gains. Tony as a father wants his kids to have no part of what he's done. In a way this is what Don Vito wanted for Michael. Legitamcy, which participation in the "family" cannot provide.