I'm going to go out on a limb here and suggest that many voters choose style over substance. Women the gay community and of course the life-long liberals and their associates and families. 

Trudeau may be younger, better looking, but that's all there is. He is not very bright, dwells on his laurels and is out of touch with the average Canadian. 

He is an opportunistic, disingenuous hypocrite that is about to be eaten alive by the consequences of his own poor judgement. People remember the words that politicos speak and so too shall Trudeau be hoisted on his own petard some day soon.