Remember that apple contributed to the USB-C format, and prefer it for all their other products.
In USB-C, all the pins are protected by the outer shell.
In what way? Every single lighting cable I've had since the switch was done years ago is unusable after a few months. The same pin, 4th from the left, wears out after a very short time. This has happened across owning multiple phones and iPads. I've lost count of the number of cables I've bought from either Apple or a 3rd party.
I see the exact same damage on other people's cables frequently. I'm honestly surprised there hasn't been a class action lawsuit against Apple about this.
One can rub the black stuff off the pin using a regular rubber and it usually works again