Simple proof: no one knows what the best diet is, hundreds of scientists and skin-in-the-game athlethes are bickering and trying different things out but no-one still knows anything.
No one knows that the best foods are for longevity and performance. Such a thing would need a full-generational study. You cannot just "I tried a diet for 1 month and X and Y happened".
1 month is nothing. At least 6 months are needed, 2 years in major changes can still be happening.
Also god forbid you trust the offical food pyramid, so many of these "stupid bro science" advices can have a lot more truth to them than the "offical advices" because they were tested via skin-in-the-game.
1. It's fat, which helps get fat soluble vitamins (if you take them while fasting) digested and metabolized.
2. Butter at least (likely ghee too, but I'm not sure) is full of butyrate, the metabolites of which are heavily involved in ketosis in humans (and is hypothesized to promote ketosis, though I don't know if that was conclusively demonstrated)