Do we need to cut out all our food sensitivities? Would we potentially cause more harm than good?

Is red meat the danger that some media would have us believe or is it the angel like food Liver King and Carnivore MD make it out to be? Maybe it's somewhere in between.

Protein! How do we properly manage and cut weight for sports that have weight classes AND if we want to perform, do we really need to count macros?!