> Beef has ~3x more protein per gram than legumes

   - Chicken: 27/100g
   - Beef: 31g/100g
   - Hemp: 32g/100g
   - Pumpkin: 33g/100g
   - Soy: 36g/100g
   - Seitan: 75g/100g

Missing amino acids isn't a problem IRL as people tends to eat different stuff.

Eating only one type of food is not good for your health, whether it is a plant or animal product.