Let's keep our fingers crossed then!
I wouldn't say it's my principle reason, but I'd be lying if I said it wasn't a contributing factor. It's not about fat-shaming as I could stand to lose a double-digit number of pounds myself, but I believe that the way in which the mayor treats him or herself is indicative of the way they will approach running the City. If a person can't be arsed to treat themselves with respect, to show concern for their own personal health and well-being, then why should I believe that they'll treat the city any different? If a person runs their life with poor impulse control, then what's going to happen when they're put in charge of a $10b budget and tens of thousands of employees?
Image is extremely important for a City's reputation and livability, and if someone doesn't project a good self-image, then I have no reason to believe they'll impart a good image on the city.