I agree it’s a mess. I’ve found it frustrating to source reliable info. A carnivore diet that works immaculately for someone could give another person chronic seizures.  I believe fiber from plants can provide value to some. You’re sounding like a Shawn Baker maximalist but I’m not gonna jump to conclusions.

More recently I’ve been compelled by nutritional theory around the idea that food is an electromagnetic “barcode” printed by the sun, directly or indirectly. It makes sense cuz all food traces back to the sun. This means we may eat optimally by eating hyper-local whole foods because our bodies get the same solar signaling. Epigenetics and methylation probably play a big role too. The major problem seems to be so many western people are so far removed from nature’s signals that we’ve evolved with, their bodies and mitochondria are barely limping along to metabolize the nutrients it should know how to.