well, Ennis was the poster girl for the whole build up so she had the appropriate personality, plus she's been in all the twat mags recently cos she's getting married an that. Then there's the fact that she can pass as white, and doesn't pray to allah when she wins medals, so racist britain can like her.
ennis benefited from the fact the achievements of the female athletes inspired wimmins sport-wise, and moved em to vote, but they weren't going to vote for the other women, cos they had nae chance of winning. (like any men actually vote for bollocks like that anyhow)