Not true at all. Name anything necessary about them.
"It is difficult, if not impossible, to get all needed nutrients in a diet devoid of caloric carbohydrates"
Carbohydrate foods tend to be nutrient poor compared to foods you eat on a ketogenic diet, and there are no necessary nutrients that only come from hi carb foods.
"Since the body does not burn those calories, they are converted into body fat as stored energy..."
It's a more complex process than that. Calories in vs calories out is wrong. That's not how body weight is regulated. Your body and appetite actually adapt to what you are putting in it.
"The Keto Diet is indeed not suitable for continual use: It is too acid-forming systemically..."
Do you mean the high protein diet again? That's not Keto. A ketogenic diet is suitable long term. It is a natural diet for a human. We are carnivores that can consume vegetables when we have to.
I’ve heard of “fast carbs” (e.g. grain, rice, pasta) versus “slow carbs” (green leafy stuff, broccoli et al.), and I’d always thought the latter would fill any healthy “need” for carbs...is this not the case? Is there really no difference?