I think this has less to do with convenience during travel than to track and control people. If you have a verified gov ID for all your online activity, then how easy would it be to attach a gov social credit score to your online activity?
Just a question.
no personal experience with this, but I've heard that if you don't voluntarily "Tap" your phone they will take it to a back room where they clone the whole phone to a USB drive, and brute force the USB drive on some specialized black box that will tell them everything they want to know, AND it will install spyware on your phone, so they can continue to monitor you in the future.
If you just "tap" your phone voluntarily, then it will still install the same spyware on your phone to monitor you in the future.
One is "more convenient," but both options are very bad as legal citizens.