All of the bodyguard scene stuff smacks of directoral license--Clemenza has an opportunity to call Michael "a civilian," the better to set him up as a non-civilian afterward. And, if the bodyguards had accompanied Michael to the hospital, we wouldn't have had his transition to a non-civilian ("I'm with you now, Pop"); Enzo Da Baker and his willingness to stand alongside Michael, and Michael's confrontation with McCluskey.