Also from what I’ve read Karachi is a pretty clean city, has good roads, is not that dense and has a lot of development happening there. A journey to Karachi that changed an Indian
I think you are definitely lucky to have those relatives and a chance to visit.
Personally I wish I had pakistani relatives. I think it would be fascinating to get insight into another country and culture which u can really only do if you know locals. So what if I was not blessed with pakistani relatives I can make my own in the desi tradition of munh-bole relationships.