To be fair, while dark chocolate may not help you to lose weight, it's not all that bad a thing to add to your diet. You just need to remember to count the calories in it as a part. (My preference is unsweetened cocoa powder, which may not really be chocolate, I've never been sure.)
And I rather like chicken mole (my recipie, as I have a requirement that neither the chicken nor the sauce have added salt).
The problem is the people who think that chocolate flavored bars of fat are a weight loss aid. (Check out the carbs of unsweetened cocoa power, though. It's quite low.)
Also, I believe that, as with coffee, chocolate contains useful phytochemicals. Just as do kale, chard, and other dark green leavy vegetables. (I'm not so sure about most beans, as nobody seems to have been pushing them. Probably, however, kidney beans have them, as they are generally found in darkly colored vegetable foods...like broccoli and brussel sprouts.)