Who stated that other sports haven't had drugs issues? But the scandals in cycling have been multiple and widespread around most professional teams in the past. And when you do have someone who seems to be doing the impossible, in a sport where the previous people who did the same were found out later on, then it might have a sway. And the BBC do include people from sports they don't cover, (I don't think they do Baseball for example), but they do seem to favour ones they have already got rights to show footage from.
But anyway, I'm just giving potential reasons why he isn't involved, but I also think he should be included. Not enough for me to post that I'm going to boycott about it as I never vote in these unless it was a Villa vote anyway.