Plus it's a team sport overall, you can reasonably say that if Lewis had been in a HRT or McLaren had made a car equivalent to the HRT he'd be nowhere near the championship, a driver is dependent on his (or her) team building a fast car in a similar way to how they're dependent on giving them a good strategy, or changing their tyres quickly, or giving them a reliable car.
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But take that lot, Jeez just take half of that lot, and without it he'd have a substantial lead.
Yeah... if you completely ignored other driver's misfortunes!
Which is my point; Lewis isn't the only driver to suffer misfortunes in the first eight races, Vettel has had two retirements while in strong podium positions, which is just one example; Mclaren have screwed up in pitstops and strategy but have had better reliability than some others, notably Red Bull! If no-one had crashes or reliability issues, Lewis wouldn't be leading the championship!
Is he though? Leading?
Nope, Alonso is leading, but I think myownalias meant in response to the scenario where we can discount Lewis's bad luck and he would be leading the championship, if we take that scenario and discount bad luck for other drivers Lewis wouldn't be leading.