Remember this: Michael always wanted to be respectable. That scene in FGII he seems as any other businessman planging to invest in Cuba. He is introduce as "our assosiate in leisure and hotel business"(something like that - I don't recall the exact words).
The real quistion is: who was more respectable after all, Vito or Michael?
With all my love to Michael, I think his father was more respetable.