“The ability to acquire, understand, and use knowledge.”

Someone having faster reflexes giving them the ability to catch fast moving objects is not a matter of knowledge, but muscle strength and agility.

The same would go for running, or swimming, or catching a fish with giant claws.

When doing things, it’s whether the limiting factor is physical or if it’s information they have or don’t have.

I suppose with running, for example, there will be a lot of knowledge for running technique. But no amount of technique or breathing exercise would make up for lack of muscle.

Most of those do not fit “smarter” by my understanding of the word. Someone that can run or swim faster than me is not smarter than me. Someone more skilled in shooting a gun is not smarter, either. Most of these abilities are separate from intelligence

Sounds like a skill issue to me