Zach, if you have access to protein in the form of real food through your job, go for it! It's important to have multiple sources of protein because different proteins contain different amino acids. There are about 10 amino acids called the essential amino acids because your body is unable to manufacture them, so you need to consume them (there are others that your body can build if the components are available). So, different proteins will provide you with different amino acids, and that's important.
Steak? Tuna melt? Why not?