That little booklet they call a passport works pretty well for determining where you’ve been and if you should be allowed to head to the US.
Nice of you to clarify that you don’t travel internationally, but still have big opinions on it.
A passport is useless for this purpose. Looking at mine, a border guard would be able to determine when I entered several countries, but not when I left them. If you knew the first thing about international travel, you would know that lots of countries (including, for decades, the US) do not apply departure stamps.
Then, there is passport-free travel. I could go to dozens of countries and not need to bring more than my ID card.
Nowadays, even if you do have to bring your passport, you often do not receive a stamp during immigration. Automated passport control has made them a thing of the past for many travellers and especially avid frequent travellers to the US who use Global Entry; i.e. potential super spreaders.
Frankly, my Apple wallet holds an infinitely better air travel history than my passports.