Yes, that would work. To the best of my knowledge, these radios don't have that capability now. So, I'm assuming that it would take a firmware change to put the radio into a mode where it's locked down to the amateur radio bands out-of-the-box, but, let's say, a specific key press on power up opens up the radio.Or, clipping a jumper, removing a resistor, multi-key press with power on, like the many of the current MARS/CAP modifications?
The point I'm getting at is folks like Amcrest and Baofeng Tech, could make the radios they sell compliant with the rules, but they will probably have to convince the parent company back in China to write new firmware.