if you think garbage-collection is ok, then you must think it's ok if your son or daughter wants to work as a garbageman in that industry. If it's not ok, you're a hypocrite.
if you think an empty septic-tank is ok, then you must think it's ok if your son or daughter wants to work as a >ah< "pumper" in that industry. If it's not ok, you're a hypocrite.
if you think porkchops are ok, then you must think it's ok if your son or daughter wants to work as a slaughterer in that industry. If it's not ok, you're a hypocrite.
if you think Alaskan King Crab is ok, then you must think it's ok if your son or daughter wants to work as a short-haul harvester in that industry. If it's not ok, you're a hypocrite.
All of those industries that you quoted are good, hard honest work. I would not be embarrassed to tell anyone that a child of mine worked in any of those industries. I would, on the other hand, be mortified to tell anyone that my kid was a porn star.
Try again.