Should pilot's feel guilty then for flying in the garbage food for the community stores, seeing as obesity and diabetes is such a massive problem?
Should pilot's feel guilty for flying passengers to certain Asian destinations because they may be exploiting people in the illegal sex trades?
etc, etc...
As wiz wrote, I get paid to fly an aeroplane within the law. I have flown grog into "wet" communities. I have refused to fly, and involved police when necessary, passengers trying to take grog into their "dry" communites. I have seen many keycards kept to pay for flights (only). I sleep really well at night.