why? What does being a rain specialist prove? So are Button and Barichello, (and a few other drivers in the field), anyone ever compare them with Senna?
Sure I'll take that drive in to account. But I reserve the right to take all his other drives in to account when forming an opinion of his "talent". Only picking and choosing the "best bits" as evidence of "special" talent is the defacto definition of bias.
As for massa it is patently clear that there was a problem with his car. People making accusations of him not having throttle control obviously choose to blinker their ears to the commentary during the race, (coming from far more talented and experienced drivers than anyone on this forum !), pointing out that he hardly touched the throttle and the car was stepping out on him.