Think about it. How long would it take an employee to open up, inspect, diagnose and repair an Apple Pencil? And what does an employee that is able to do this cost in the US?
The pure production cost of an Apple Pencil is probably very low while employees in the US who can repair this stuff are rather expensive and I bet half of the time you won't even be able to repair it so they waste time and money on an employee trying to fix it and then they have to replace it anyway.
They will just replace. It's easier, cheaper and more reliable.
In case it helps anyone else, I suspected a dead pencil. Tried everything - leaving it plugged in for hours, pairing, restarting the iPad, removing the tip, tightening the tip etc. Nothing worked. I just now tried restarting the iPad *with the pencil still plugged in* and it's come back and...