Here's why:
* Left-handedness isn't a cultural construct: While some cultures might have specific words or phrases, there isn't a standardized directional term like "lefty" or "southpaw" that is recognized globally.
* "Left" is already directional: The word "left" itself is already the directional term, so adding another word to it would be redundant.
However, there are some colloquial terms used for left-handed people:
* Lefty: This is the most common and informal term.
* Southpaw: This term is more prevalent in baseball, where the pitcher throws with their left hand.
* Sinistral: This word comes from the Latin for "left" and is used in scientific contexts.
Ultimately, "left-handed" remains the most straightforward and accurate term for describing someone who uses their left hand preferentially.