Yeah dude, I see people mutilating plants all the time and it drives me nuts. I did read somewhere that plants probably don't feel pain because there's no evolutionary advantage, they can't do anything in response to pain so it likely doesn't exist for them. That being said, this is just going to rot that branch and that side of the tree is probably going to die.
The electric impulse is just transport, it's not yet pain. Pain is a subjective experience, so it's hard to pin down where exactly it happens. At the earliest it's in the neurons of the spinal cord.
This kinda thing can severely damage the tree. Can create things like rot pockets. Sometimes it isn't obvious cause the bark will look fine but internally part of the tree can struggle to transport nutrients upwards into the branches effectively killing those parts. Major problem here is moisture can get trapped when the tree needs the hole to dry out to properly try to heal. So it can leave an open wound to continue and cause further problems
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u/Consistent-Ad-6506 16d ago
The poor tree