Most do not think of a handgun as a long-range proposition, because of perception. They haven't done it or seen it done regularly because they do not have access to a place to do it, most handgun shooting ranges going out to no more than 40-50 yards. Being a matter of practice, like everything else, there are just not a lot of practiced individuals out there due to this perception.
My initial training/introduction to long range handgun shooting, as I mentioned in the original post, was more about changing that perception than anything else. After that it just became a matter of practicing to become efficient, same as if it was 5 or 10 yards.