Okay, I'm just too lazy to highlight and use the tag.
Well, if you can prove something then that'd be a start. He's just a very good cricketer. I mean, you can be a very good cricketer and not because you are deformed: Bradman.
I see your point in the sprinter example but I have a grey feeling about it. Not all black and white. Don't think that because I am replying in this fashion I am totally okay with the thesis.
Running is a discipline where you're enabling yourself further - with that advantage - and by that you are not disabling someone else. See, if Murali is being helped so much of because of his deformity, that means all batsmen that oppose him will be disabled from playing their natural game. They have to deal with Murali and their figures will drop, so will the opposition's success in total.
But a sprinter runs against himself as much as the opposition. The runner with the amazing amount of twitch fibers will always win, okay, but it doesn't stop his fellow runners from running as fast as THEY can. See? Big difference. And then when you acknowledge that X runner is this good because of it, then those that come 2nd, 3rd and on will compare themselves that don't have that many twitch fibers.
To clarify: If a sprinter is running in the 100m in 9.9 seconds, he isn't going to be slower because the guy next to him is running it in 8 seconds. But Murali's advantage works to disadvantage his opposition. Hence, it goes a step further than just being 'unfair'.