And you can absolutely do the same on the exterior: add a physical lock that interacts with the latch.
No, you can't. Because, again, there is no method available to lock and unlock the door.
Whether it's a software lock or a physical lock is irrelevant.
No it is not. If you want mechanical door handles, you also need mechanical door locks. A computer cannot unlock a mechanical door handle without a mechanical door lock mechanism. Adding a mechanical door lock means rethinking the entirety of the passenger entry system, as they currently function completely differently, as I've described above.
That's basically how every other car work.
Again, that is not how this car works.
There's no reason Tesla cars couldn't satisfy that interaction.
I think you've lost the topic of this conversation. The topic is not that it's impossible. It's that it's "harder than it sounds".
We are going round and round here and I keep repeating myself over and over but I'm clearly not getting through to you so I'm gonna call it a day.