I will admit there plenty of decent technicians out there working on all types of equipment; what sets the good apart from the bad is the ablility to diagnose and troubleshoot complex problems. The best of the best are VERY proficient electrically. If you don't have the skills with schematics and can't make heads from tails with a Fluke in your hands, you don't have a shot at correctly repairing a Geo Metro.
There are more than a few A&P's out there that love to puff their chest up about working around machines that now cost up to $65 million. The fact is, the responsibility taken when signing off the simplest of tasks on a small single-engine piston-powered Cessna is no different than a sign-off on a $57 million Canadair Global Express, Falcon 7X, or Gulfstream G550. The Feds have your name, soc#, and your address. Any deviation from procedure that causes an incident or accident, and you're open to FEDERAL scrutiny as well as a slew of lawsuits. The regulations would fill all the open space in your home, and they have to be followed, as well as everything the manufacturer of the equipment requires. I have been the Director of Maintenance for several corporate and charter jet operators in my day, and have been held directly responsible for the airworthiness of those aircraft by the FAA (they have to have someone to point the finger at).
In the automotive or marine industry, you have no obligations or responsibility to do the job right to anyone but yourself, your boss, and the customer, and that's if you have your values in the correct place.
For all of you that appreciate all that beautiful rigging accomplished by the elite in the offshore industry; don't forget that it's copied from what is and has been practiced in aviation since the first regulations were written.