Protein powder was created in the 90's because, the dairy industry decided that instead of throwing out the leftover waste, they could turn it into powder and sell it to body builders as a "supplement".
When you eat green veggies, you are taking in a great supply of amino acids. Combined those green veggies with "healthy fats" and you will have all that you need for your body to "Create" strong protein cells throughout your body. Your body CREATES protein.
Another point you guys will like is that a diet rich with healthy fats will boost your testosterone levels.
Eat healthy. Quit making excuses. Enjoy life.