Aviation safety is all about statistics.
So true. And so untrue.
The “statistics” show that pilots with CVD are able to pass licence, rating and recurrent checks to the same standard as pilots without CVD. Yet...
The “statistics” show that piston engine manufacturers’ TBOs are ar*e plucks, and that changing a well-run and well-running piston engine at TBO is merely buying risk. Yet...
Aviation safety is mostly about manipulating or ignoring statistics in favour of intuition or the promotion of well-entrenched special interests.