They see who they are processing the application for based on the copies of your EAD that you must submit. Based on that EAD, they can pull any biometric info on you, so that when you go do your renewal biometrics, not only do they use the photo to cross reference, that is why USCIS takes your finger prints. If you send pass port pictures you’re not following instructions. Look send them if it makes you feel better. You’re not causing any harm —I bet when uscis reviews them and they see passport pictures they roll their eyes and throw them away .