I am a Pharmaceutical Development Scientist currently working with 2 registered licensed Ph.D Dieticians and a registered licensed Ph.D. nutritionist. I fully understand the science of what the Keto diet was originally developed to do back in 1921 and what it has been used for in controlled science since. No ignorance here.
Today, the Keto diet is being touted as a modern miracle and is being used as a fad diet with magical claims around it. That makes it like all the other fad diets that gained popularity over the decades and were all eventually found to be unsustainable...and really only worked by simple energy balance over the long term.
Like I said in that post, people generally want to believe in magic and quick fixes...but choose ignore the basic science.
Long term success can only be achieved by controlling energy balance. Calories consumed and calories burned. If one is more that the other, the mass balance moves to that side of the equation.