But one still can stay lean on it if they just use up the energy eaten… But indeed, as far as I know, it’s not a good woe for many (probably most) people. It’s for the ones who can pull it off I suppose.
A little vegs can help a lot with fat as I experienced. It’s surely very individual how much carbs are needed to eat much fat. My SO (HCHF for life, it seems) needs a lot. He loves fat but he has problems with it without a significant amount of carbs (he doesn’t get satiated that way - only belatedly).
I used to need “filler” for my carbs, that was mostly vegs on my original, vegetarian keto (40g net carbs a day, it was very little vegs as I needed carbs for other things too but still a significant volume and it “soaked up” a lot of fat). My first carnivore trial was lowish-fat because I got nauseous without my usual volume, the fat was a too big part of my meal even if it wasn’t any more than before in grams or percentage. It only lasted for a few days but some people may need more time…? Or they just need their plants. I merely needed lower-fat for a while at that point. And I couldn’t handle greasy food, i.e. much added fat. So there are so many factors when it comes to handling the proper amount of fat.
But for me, it was the volume. It was fine using just a few plant carbs with a lot of fat as long as the plant was very low-carb and especially when raw so the volume was big enough. Too bad I always hated most green leaves… But I always loved and ate much fat, the minuscule amount of vegs keto allowed without using green leaves was enough.