I don't know. It's legal and people have the right to bet on whatever they want to bet on, but with it being so mainstream now I worry about how many people are going to completely ruin their lives with the addiction. Yes, that has always been there, but it has been made so much easier now.
And I get that you could say the same about other things, like alcohol advertising, but at least that is mostly limited to the commercial breaks. Gambling is being pushed everywhere and it is only going to get bigger.