I don't think it should be required that devices protect users from unsafe modifications even if they're foreseeable. I can also tape down the safety bar on the lawnmower, remove the guards from the circular saw, and take the firing pin block out of the gun. I'm sure people have done all of those things, and some have regretted it.

What I'm advocating is a bit beyond just repairability; field-replaceable batteries the ability to charge spares externally, and the ability to share spares between devices are substantial benefits.