I don't know, this what-if-question is a little irritating. It's like asking "What if Vito was incompetent?"

Vito: C'mon, Fredo, it's christmas eve, tell Paulie to drive me to Tat's Micky Mouse Club in the Bronx. Let's have some fun.
Fredo: Look, Pop, Paulie called in sick this morning. I don't trust Tattaglia. I smell a rat.
Vito: I teach you how to do the sandwich...
Fredo: Stop it, Pop, please, let's ... (He's being interrupted by two gunmen who seem to appear out of nowhere, he pulls the gun, shoots them down, looks at his hands, they don't tremble.) Let's buy some oranges, I'll drive you home. And tomorrow I'll take care of Paulie.