I have a hard time eating a full serving of eggs for breakfast. Finished the official Whole30 a couple of weeks ago so I know it isn't just that I can't trust my hunger signals. But for me, if I have 2 scrambled eggs with some coconut milk mixed in as a healthy fat, and a small amount of roasted veggies (kale, squash, broccoli, or beans, etc), that feels right for me. I could add in a piece or two of bacon, but any time I add in a 3rd or 4th egg I have to throw some away because I just want to throw up before I'm finished.
All that to say - for some people, it might be better to plan a half serving of eggs and a half serving of meat rather than a full serving of eggs!