I dived actively from 1970-1980, I have no memory of completing a medical form for my LA County training, perhaps I did. I was 16 years old, a minor, I suspect my parents had to sign a release, but don't remember that either.
Skip ahead. I have been a very active diver since 1997. I submitted medical forms for all my PADI training, last in 2005, and for my SDI Solo course in 2013. I don't intend on any additional training.
Thus far, I have never had to submit medical clearance for diving with any operator or on any liveaboard. I have visited a few modestly challenging areas such as Red Sea, Cocos, Galapagos, Revillagigedos, and Malpelo. Some of my drift dives in SE Florida over the past 13 years have been at least equally challenging.
In the future, if a medical clearance is required by an operator or liveaboard, I would have to evaluate how much I wanted to dive with that operator or on that liveaboard and what options might be available to me. If using the RSTC form, I would fail screening and be required to undergo medical evaluation. I'm quite sure I would be approved to dive and would be glad to submit the page 3 approval to fulfill the requirement. I would not turn over the page 1 and 2 questionnaires.