Yeah. Egg whites aren't that great. I think they are just easy to fix and provide variety. They can't be fixed on the road, so people have them in the morning and evening. They are also a traditional breakfast food, which many people like.
I like to have 7 or 8 egg whites with a lot of fat free cheddar and green salsa for some good flavor. I can get as much as 40g of protein out of this, and it is a mix of egg white protein and casein from the cheese. Tastes better than meat, tofu or powder in the morning.