Psych prof who studied gamblers one time once explained to the class that he concluded that gamblers actually love to lose, and I have always bought into it. We love to bitch and whine much more than we love to brag about being right (for the most part). Winning all the time would be fun short term, but wouldn't make it much of a gamble in the long term. Eliminate people who actually do this for a living and it makes quite a bit of sense.
And these controversial decisions aren't gonna keep people from betting long term, they just feel good bitching about it short term