It's such a specific skill to recognize food allergic reactions. It's one that you can train only after such disciplined exposure in medical school, residency, etc.
...specific like all these abilities you have been pondering. Chess is so specific, all about this specific board set with such specific rules. Yet you see a beauty to its craft, its tactics, its strategy.
Software engineering, too - seeing code patterns, navigating web interfaces, searching for info. That description may already be too broad: the broad skill of adapting, learning new things, reading carefully and applying astutely. But the specific skill could be using your company's tools proficiently... engineering. Management of engineers.
Yet here we all are - humanity! Each acquiring different skills, different experience that one can then use to serve others. We must be aware of our skills, experiences, and tendencies, and translate them to serve others.
Perhaps you shouldn't be honing in on specific skills. Maybe it's making you miss the forest for the trees. *The big picture is simply to experience and enjoy life while serving others with your abilities, which come from your tendencies and experience.*
Give to others in your own special way. Be comfortable and love that.