I think people overestimate the so-called natural talent to a large degree and underestimate other factors such as experience, motivation, opportunity, who gets selected and coached and who does not. I sailed with guys who’s biggest talent was keeping the mate away from the controls.
In any case natural talent is likely disturbed like this:
If it’s the case that only the mariners in the third and fourth deviation (2.1% and 0.1%) are suitable for some jobs then the screening process and pay would reflect that. That doesn’t seem to be the case.
Risk would also be a factor, if some jobs can be only successfully be done by rare few then other factors could be adjusted, smaller weather window or more maneuverable boat etc.