Dare I say it?
He's the most physically unfit driver on the grid. He's lazy and a drunkard, and he sleeps a lot, even before races. He couldn't practice anywhere near as much as the others, not even at a younger age, because of how cold Finland is (which helped him learn how to drive consistently fast while preserving his tyres). He didn't even have a superlicense when he started racing in F1 because he was "unproven".
And yet he's always been at the top and is one of the greatest drivers of all time. And I'd dare say he's a little underrated, considering he unfairly lost at least two championships. Not only that, but he's just come out of retirement and he's already doing a much better job than the (arguably) greatest driver of all time.