Agreed. And so, too, did Tiger Woods. But not when it came to being the lead in the Ryder Cup. McGinley is aware of this and recognises that the biennial dust-up is unlike any other golf event and, indeed, unlike any other sporting encounter.
Just ask the likes of Hal Sutton, Curtis Strange, Tom Lehman and, most recently, Davis Love about the propensity for a supposedly outrageous strength to turn into a defining weakness.
Quite enough has been said about Woods, kryptonite, Ryder Cup and unstoppable momentum to acknowledge the bizarre perils of having the indisputable No1 on side. That is why McGinley is as undecided on McIlroy.
"He's obviously going to have a big role at Gleneagles, but I haven't yet crystallised exactly what that role will be," McGinley said. "My communication with Rory will determine that. I want his feedback first."
But he already knows what McIlroy will say. Dare he hide him to protect his team?
One captain's quandary is another's opportunity and Paul Azinger, the one United States captain to have cracked the code this century, believes Tom Watson has little option but to go hunting McIlroy as he seeks to gain the early impetus which is so vital for any away team.