I dove a couple of weekends ago with a hodge podge mix of divers. One PADI Course director, One active instructor, One DM, One Master diver a few advanced (myself included) divers of varying degrees of experience. ......
After seeing the Master diver in the group freak out and have to be brought up to around 30' holding her partners hand (most of the group was hanging around 70') after seeing a large group of sharks....had me chuckling (sorry John if you're reading this thread).
So what! I don't see any connection with dive proficiency per se. She found herself in a new environment (lots of sharks) and got scared. There is no "overcome all your fears" specialty PADI course that leads to master diver. We should all be so fearless as you.
End of the day, you can be a less than proficient diver with all the certifications in the world. Experience comes from working thru tough dives and rookie mistakes.
Ahhh! You must have the "tough dive experience" certification and the "I've conquered all the rookie mistakes" certification. Congratulations. And without the certs (training) you can pick up bad habits from experience diving with other "bad" divers, with the same bad habits, which would make you a "less than proficient" diver.