So, in your world, 100 calories of donut = 100 calories of broccoli?
Yes, strictly from the point of view of calorific value, yes.
Obviously in the human body it's going to have different effects,result in a different spike in blood sugar and because a big part of the broccoli's carbohydrate contents come from fibers you aren't going to get all the actual energy content from broccoli's carbohydrates.
The point is, like I said in another post, calories are by far and away the biggest factor; thus it's going to be a determinant factor. I'm not saying it's the only factor, but it's definitely biggest one. All studies show that a sustained calorie deficit leads to weight loss. Of course by eating certain types of foods and avoding others, being able to hold that calorie deficit may be easier or harder for people. But the key element is still calorie deficit.
Your claim is incorrect. You're making random assertions about health professionals.
It's not obvious. Up until, at most, 10-15 years ago, people like you were recommending calories in < calories out. That's why you see 100 calorie packs of Oreos and shit, even today. It's bad misinformation that works, at best, temporarily
Again, sustained calorie deficit works. Like I said, there's lots of different ways / "diets" to achieve a sustained calorie deficit and most people are going to find it easier to achieve on fiber and fat-rich foods.
Again, eating legumes isn't going to cause you to keel over and die. Is it the best for losing weight? No. Meat and vegetables are the best for losing weight. Can you eat them in moderation once you've lost the weight (or sparingly during)? Yes, of course.
Avoiding legumes is something that may or may not ultimately matter. There is a mountain of science that shows eating whole grains is not good for weight loss. Anecdotally, my girlfriend and I as well as a couple other friends lost 30+ pounds avoiding grains, sugar, and starchy carbs. The "New Weight Loss Before/After thread! Pics ahoy!" on here has plenty of people who went keto, paleo, or both and lost good amounts of weight.
The whole "eat plenty of whole grains and low fat meat" bullshittery needs to be left firmly planted in the 90s. The only time high carb works well for weight loss is if you're also killing it in the gym, which most people are not. This is also what leaves a ton of people "skinny fat."
The paleo point about legumes and whole grains wasn't necessarily something I was approaching from a weight loss perspective. Even then, legumes are pretty satieting, so I'd seriously doubt they're a one of the problematic foods for people who struggle with weight management, but I'll have to look up some studies on that before making further claims on that.
No idea what's the relevance of you saying that you lost weight by avoidng grains, starch and sugar. That's great for you, but I that's more conforming with what I have been saying than otherwise. Obviously you're likely to lose weight if you avoid calorie-dense foods.