On the mach E, my understanding is there’s a panel where you hook up a jump box that supplies power to those circuits to allow you to use your key fob to open the door. But there’s no bladed key to manually unlock the car. So technically there’s a failsafe but it’s not ideal. And I agree it ought not be allowed.
There’s a little panel you can use the uncut key blade to pop out and a power and ground wire in them that’s accessible outside the vehicle. Of course that requires you to have a jump box or another car and some leads. I don’t know who needs to hear this but stay real close to civilization if you drive one of these. Don’t get stranded in no man’s land.