That's logically backwards.
You can't have clean sheets in spite of your goalkeeper. Also, people weren't saying this when Van Der Saar or Cech won it, they were recognised for their achievement and contributions.
If Hart was Italian, he'd be one of the best keepers in the world to most. He's shit because he's English and the daft stereotype that all English players are overrated was fought against until it became the now stereotype that all English players are wank.
I notice this a lot really.
A: X is good, not great
B: X might be great
C: X is great
D: X is overrated
A: X is good, not great
C: X is good
D: X is wank
Most of the world is made up of D's unfortunately because they consume media and the sports media is infuriating and atrocious. Every controversial opinion seems to have a swingometre that very rarely lands anywhere but an extreme opinion. Hart is an excellent example of this