Is Mark a carb nazi? He does say it is the key to weight loss. You left off the the bit of his quote which stated:
"0-50 grams per day: Ketosis and I.F. (Intermittent Fasting) zone. Excellent catalyst for rapid fat loss..."
The question was "do we need fruit?".
The answer is no. Quite a few societies live long and productive lives with zero fruit consumption.
The "Seven Deadly Sins"
• Grains (wheat/rice/oats etc) . . . . . • Dairy (milk/yogurt/butter/cheese etc) . . . . .• Nightshades (peppers/tomato/eggplant etc)
• Tubers (potato/arrowroot etc) . . . • Modernly palatable (cashews/olives etc) . . . • Refined foods (salt/sugars etc )
• Legumes (soy/beans/peas etc)