After looking at it for a while, I came to the conclusion that most (emphasis on 'most'. The problem is to know which one is) dietetic science is junk and that we're more in religious territory than anything else.

So if I was you, I would do whatever feels reasonable (maybe meat 2 times a week, drastically reduced amount of processed foods, particularly sugar etc).

IMHO in diets like in politics the danger is always in the extremes. I wouldn't go full vegan but I wouldn't eat meat 3 times a day either.