I don't think you actually read the article. He goes into detail about the expected value argument for buying tickets (which you see all the time when the jackpot gets large). He does the correct calculation, taking into account the different prizes and multiple winners to show that the expected value is still negative AND at the end explains why as an individual expected value isn't really an appropriate way to analyze the problem. And then yes, after doing math things he uses the last paragraph to explain that the lotto is entertainment for him. I think it was a great article and a very mathematical one at that. So what if he says something non-mathematical in the last paragraph.