The funny thing is that most nutritionists and most MD's including the mainstream medical websites like Mayo Clinic doesn't agree with your exceptionally expensive dietary preference.
Not agreeing - as long as there is nothing proven, just opinions, its OK they do not agree. Appealing to the majority is a logical fallacy. Facts are what matters.
If its "exceptionally expensive" - thats hard to define, its dependent on one's location and financial situation. Its almost always cheaper than medical treatments related to bad diets, so, this is quite subjective. I would always prefer a more expensive diet and being healthy than having a cheaper diet and being unhealthy.
The things you keep saying, you yourself don't follow. You supplement your "carnivore diet" with berries which contains sugar, carbs, and fiber because the true carnivore diet is giving your problems.
I would not call my diet a carnivore diet, I am somewhere between keto and carnivore. Berries contain about 7grams of sugar per 100grams, I eat daily or every other day about 50 grams, which is about 3.5 sugars a day, which is hardly something to even talk about in this context.
The "problems" were just high alertness and being too lean, which is common in the beginnings. It seems to be solved now, but I will probably continue with some low sugar fruit, who knows. Also, if I am more carnivore or ketovore, fluctuates. Its not a law written in the stone.
Even most experts say that a carnivore diet is unrealistic simply due to the fact most people around the world can't afford the diet due to high cost.
Which is irrelevant from the nutritional standpoint. Poor people have poor diets, thats the nature of things. Good things are frequently more expensive than low quality things.
Its also quite a strange argument, everybody would need to compare prices in their own shops, "experts" from the other side of the planet are irrelevant for my personal prices in my specific town.
Even if most experts are lying and there's a conspiracy at hand against the carnivore diet, most people really have no choice because the "perfect" carnivore diet is unaffordable to most people. The rest of us just have to adapt won't we? Find alternatives, fill the gaps with exercise for example. At least exercise is free. I'll run barefoot on the streets if I have to.
This is just repeating your previous two points - appeal to majority and arguing from your personal economic standpoint.
In western countries, if you do not buy bio/organic, then meat is quite cheap. If bought instead of pizzas, nutritionally-empty veggies, unnecessary exotic sugary fruit, various sugary drinks, alcohol, cigarettes, highly processed vegan meat alternatives etc, it may be even cheaper. It may be more expensive "per 100 grams" than for example rice or bread, but its also much more nutrient-dense.