Eggs are just... eggs, no matter how you write down your recipe. If you made a great cake and wanted to repeat the process, and it had three eggs in it, you'd... write down that you used three eggs. It's not really relevant to how you describe the quantities of the other ingredients you use.
But if you used 220g of flour, you're more likely to recreate the cake accurately next time if you write that down, than if you write down '1 3/4 cups flour'.
But, like, I buy them in boxes, labeled 'Large', and... they're all pretty much the same, week after week. So... sure, I can get different sized eggs. But if I want to buy a lot of same sized eggs to cook with, I can do that.
But if you used 220g of flour, you're more likely to recreate the cake accurately next time if you write that down, than if you write down '1 3/4 cups flour'.