I'm not sure what kind of changes you're talking about with your disagreement but high intake of carbohydrate could increase the amount of insulin in the body which will increase appetite. Insulin is an anabolic hormone, other than transferring glucose into glycogen store, any glucose in excess will be stored in fat tissue by this insulin via de novo lipogenesis (new fat making). Of course some people eat a lot of carbohydrate and stay lean, that's can be due to genetic and high fiber diet, but most of people doesn't have the luxury of eating lots of carbohydrate while staying lean especially when they get older. Why is it okay to consume lots of carbohydrate while taking high fiber food such as vegetable? That's because fiber reduce the absorption of glucose which control the amount of insulin being released. The key hormone here is insulin. In order for an obese people to lose weight, they need to use fat but the hormone responsible for utilizing fat for energy called hormone sensitive lipase was sensitive to insulin. Higher insulin level will deactivate this hormone which will cause people to feel hungry few hours after eating, even though they have lots of body fat.

So the ideal situation to lose weight is to have a higher proportion of hormone sensitive lipase and lower proportion of insulin which can be achieved by low carbohydrate diet or high carbohydrate, high fiber diet (for vegetarian). There are a lots of literature out there proposed the same method for losing weight. You mentioned you're a powerlifter? So do I and I have been sticking with low carbohydrate diet longer than I can remember and let me tell you, it didn't affect my performance and recovery. People usually associate hunger with not enough eating, that's true but not entirely because most of the time, hunger are associated with high level of insulin. Just imagine you have high level of insulin, low level of glucose but you can't use fat for energy. Your body is starving in the encasement of sources of fuel (fat).

p/s: If you are unfamiliar with the term I used, I apologize. I'm a final year medical student. That's why I'm focusing more on biochemistry of losing weight. Calories tracking is not effective for me because you do not know what you're losing. For example, if you lose 5 kg of weight, that could be fat, or water or worse, your muscle. People who did calorie tracking without focusing more on macro nutrient usually lose lots of muscle compared to body fat (research). That's why like you mentioned, they lose weight slower later and may be stop. That's because they lose too much muscle so their resting energy expenditure reduce. You can find the article for this topic in NCBI. Cheers