That's not was I was saying though, merely that his results are better than the mentioned riders in the historical example case. But
@Krzysztof_O is right, that the historical comparisons don't do much to further the argument. I was more arguing details than how realistic it would be for him to win one.
It will of course be very difficult for him to achieve a Tour victory, yet lots can happen in cycling and sharp declines and crashes do happen sometimes. Though you might end up being right, that 3rd will be his best.
It's his quest though to win the Tour, we can agree with it or not, and Red Bull seems to have belief, otherwise they'd not have spend so much on him I think.
I personally just hope they get his Tour prep right and he has a few years without any *** happening. What he can do then, we will see. But I don't think it's a given that he cannot win the Tour, if things fell into place for him.