That is not exactly what I am talking about. However "low carb diet" is a euphemism for high fat, high protein diet. Obese people do tend to lose weight (temporarily) on high protein high fat fad diets and I am sure that there are many studies by advocates of these diets that show certain “blood markers” improving. But the mortality rate from heart disease of obese people whose weight is being controlled by these types of diets is very high.
The sad thing is that once a person loses weight while continuing to consume bacon, smoked meats, and all the other delectable treats allowed on a high protein, high fat diet they become a true believer. From that point forward they will construct complex lines of reasoning to convince themselves that their diet choices actually are good for them despite mountains of evidence to the contrary. They will literally ignore the advices given to them by their doctors and other health-care providers until the day that they drop over dead. Just about everyone middle aged and beyond has known at least one person that fits this description. In my case, I have known a bunch.
I had a very good friend who was over 300lbs who lost 50lbs while on a “high protein diet”. After that he became a true believer and could argue anyone here under the table about the health benefits high protein high fat diet. He was one of the smartest and most thoughtful persons that I have ever known. He loved bacon and smoked meats. He was very active on meat smoking forums. When I met him at my gun club he was heavy but very active and he loved to hunt. I even helped him construct a fancy smoker out of an old refrigerator.
After a while despite sticking with the “high protein” lifestyle where he ate almost nothing but the meats which he loved so much, he started gaining back all the weight he had lost. He began having severe health problems. He had to give up hunting. He couldn't walk around the house without getting winded. His doctors advised him to switch to a more normal diet, but he ignored this advice and found a different doctor and spoke of them with derision. "My doctors haven't kept up on the latest studies and research!" he would exclaim. "They don't know what they are talking about!"
When I would confront him about my concerns for his health, he would assure me that all of his “stats” were great and that all of his male relatives who hadn't been killed by accidents or in the military had lived into their 80s and beyond. I don't need to tell anyone here how this turned out do I? Everyone here knows because the results of his choices were as obvious as what happens when you run your pickup truck into a concrete pillar on the freeway.
There are no shortcuts in life. If you become inactive and eat a lot more calories than you need whether they come from carbohydrates, fats, or proteins you will gain weight. If your excess calories come largely from saturated animal fats you are putting yourself at much greater risk for heart disease. This is a fact which even the good Dr. Atkins found out about the hard way. Are there other factors which contribute to the early demise of fat people? Obviously! But all the studies in the world won't change that fact that high protein, high fat diets put people at greater risk for heart disease, regardless of your "blood markers". But if you are a true believer that lost 50lbs like my friend or even more, there is nothing that I or anyone else can tell you that will change your mind.
You have actually offered no evidence, but it is clear what your perspective is.
We’ll just have to disagree.