There's an order of magnitude difference between the marketing and lobbying budgets of the animal agriculture industry and the others you mentioned. There is no "big broccoli" funding dodgy nutrition studies.
There is however plenty of "Anti-meat/Meat Causes Cancer" dodgy nutrition studies pushed by the World Health Organization (WHO) and Vegetarian/Vegan agenda by The Academy of Nutrition and Dietetics
Fasting doesn't make anyone money and is against desires of most people. So unlikely there's going to be any significant industry push even though it's one of the few non surgical options proven to reverse type two diabetes.
> What’s up with this internet argument style where people think that pointing out an obvious exception is a valid retort?
Because it's not so obvious exception as you think it is, in fact it's the exact opposite, it's a very common type of allergy (Mediterranean, middle east, asia) and usually overlooked by many, that's why.
> Are you seriously suggesting that they needed to provide a disclaimer about allergies to their general statement about lentils being healthy?
Anti-nutrients (beside the allergies) in lentils/legumes is a real issue, so the "lentils being healthy" statement is highly debatable.
indeed, an order of magnitude difference.