Normal
You can have connectors made for a limited number of connection cycles, there's nothing wrong with that when it is expected to only be needed for replacement. Many connectors in the car industry are specced like that I would guess. I'm guessing Nvidia decided on a connector type that only is disconnected a few times in it's lifetime. When troubleshooting, this becomes a problem, so I guess Nvidia must think their products extremely rarely fail and require no maintenance like cleaning. Also, they don't want people to resell their cards so they can just ignore that as well.