Are you serious? Iniesta rarely is in front of goal but I bet he has one of the best converting rates. He almost never misses a 1vs1 or a good shooting opportunity from the edge of the box.
Dead serious. I have no idea which Iniesta you're watching, because he's nothing like what you describe. As calm and composed he is nearly anywhere on the field, he gets like a rabbit in the headlights when inside the area.
And seriously, don't you think there's a reason he so rarely attempts to get in good scoring positions himself? It's because everyone and his dog knows he's not a goal scorer. If he was as lethal as you seem to believe, we'd play more to his strengths in that regard.
I'd love to see stats for those otherworldly conversion rates, and I'll be happy to eat a healthy dish of crow, if you're right about it.