I want to add, that there are around eight billion people o…

I want to add, that there are around eight billion people on earth and each one of them has a different DNA and therefore probably needs a different diet.
Sure, there are a lot of similarities and overlappings, but everybody has to find out what works for himself by trial and error.
I think that some humans may be perfectly fine with a vegan or vegetarian diet, others are better advised with carnivore or keto and so on.
Additionally your body changes over time and what may have been a perfect diet in your teenage years or as a child may be the wrong diet when you are growing older.