Ozbusdriver,
The point about medicals in general, is that they have no discernible impact on air safety outcomes.
There is a vast resource of medical statistics for pilots, worldwide, likewise accident reports, there is no measurable connection between the two.
Indeed, there is a case ( not a good one, but better than aviation medicals) to suggests that "driver medicals" could be tougher, because of the carnage a sudden incapacitation in a motor vehicle can and has caused, but to impose that would be political suicide --- but pilot votes don't sway elections.
Indeed, pilot medicals were originally for military screening, intended to reject some 95% of applicants, and had NOTHING to do with the minimum physical standards required to safely pilot an aircraft.
FAA did a huge study before the first FAA RPL, the conclusions are fascinating, apply to all levels of medical certification, and the history clearly show the ability of doctors to lobby to preserve cash flow ---- true air safety considerations, the level of medical certification necessary for the task, did not get a look-in.
The history of FAA v. ATC staff with diabetes is equally fascinating, the medical "standards" had nothing to do with a properly controlled diabetic being able to cope with an ATC job.
Tootle pip!!