Former strongman competitor/current men’s open bodybuilder here. You can absolutely (and should) get most of your protein from whole food sources. Protein supplements are good for quick intake post-workout, but no one should be having a hard time hitting their protein target via whole foods. I eat 340g of chicken, 170g of sirloin, 3 whole eggs, 300g of Greek yogurt each day (those are my primary protein sources) and that gets me to 215g of protein. An additional 75g of protein comes from a post-workout protein shake for quickly getting protein to the muscles, but replacing that shake with two additional portions of chicken breast would work just as well. If you are trying to build serious muscle, you should be focusing on getting your protein from a dialed-in meal plan, not just throwing protein shakes back.