And obviously ahh... nut jobs jump out of perfectly good aircraft?
There is no such thing as a perfectly good aircraft. Just a perfectly good parachute.
Why jump out of a "perfectly good airplane?" Because the door is open.
The term in skydiving is "wuffo." It comes from the tired question "Wuffo you go an jump outta a perfectly good airplane, wuffo?" The person asking this question always feels clever, as though they're the first to ask it. People who ask this question are therefore called "wuffo's" by jumpers, who understand quite well that there are no perfectly good airplanes (particularly jump airplanes), and also perfectly well why one should jump.
Having flown plenty of jumpers, and made a number of skydives myself...I would certainly disagree that one loses one's handflying (stick and rudder) skills, or that one can't make a normal approach.
Go fly a Cessna 206 with five people standing outside the door on the step, hanging from the strut, or off the side of the airplane, and see if it requires stick and rudder skills.
Certainly some approaches are unconventional, but it's not the norm. In the Caravan, I did a crosswind at 18,000', and descended from there on the downwind to a normal landing on the numbers. In a Cessna, it was a normal pattern entry and landing from a normal traffic pattern altitude.
I've never cared for the term "meat missle" or "dropping meat." Skydivers are passengers like any other, save for the fact that they don't land with the airplane; when they exit, they transition from passengers to flying their own bodies and becoming canopy pilots. Skydivers are as much a part of the aviation community as airplane pilots, helicopter pilots, or anybody else in the business.
As far as drugged out jumpers or operators, I've met one. He became a cocaine addict, wrecked his car, lost the drop zone, and everything he owned. I jumped many times at his drop zone, and never saw drug useage, or anyone jump intoxicated or impaired. I've jumped and packed around the world, including Oz (QLD, primarily)...and while there may be the odd character here or there, drunk or drugged jumpers and operators are the exception to the rule.