“If you are an American citizen, you will carry a US passport..”
The size of a US passport makes it cumbersome to carry around. Besides, carrying a passport at all times poses a greater risk for loss and/or theft. I hope you’ll never experience the problems when losing your passport while overseas on a business trip.
I have no problem with the government requiring everyone to carry an official id card. My thought was that if passports are required instead of id cards there would be less objection. Now passports are required for travel to Canada and Mexico.
Passports need to be the size they are so visas can be stamped inside them.
Did it for 15+ years . . . successfully, by God’s grace . . . no problems.