First of all public discontent should be paired with public content. The assumption that the public don't want a casino is a giant leap. I don't gamble at all, but would definitely visit many times just as I did with the downtown casino in Halifax when living there. The Halifax experience was largely positive. It added another layer of entertainment, boosted the cruise line industry, increased business for downtown bars/restaurants/shops, added some glitz to the downtown core, and regardless of what people say about casinos they are heaps of fun whether you partake or not.
Increased transit and policing requirements? That's just part of growing into a bigger city. More people bring more demands placed upon it. If you're against more demands placed upon the city, one should halt all condo projects as well.
Lastly, I support the casino purely on principle. I have no interest in living in a nanny state or having someone dictate to me their strict religious or moral code. Presbyterian Toronto the Good supposedly died a long time ago, and good riddance. Small benefit? A casino provides tons of benefits in lots of areas. Gambling is part of the modern world despite many people wanting to pretend it doesn't exist. Shoving it in Woodbine won't change that. All it will do is rob our downtown of all the things I mentioned above.