Here's why:
* The "R" sound varies greatly across different dialects. Some people pronounce it with a strong "r" sound, while others might use a "w" sound or even omit it entirely.
* Even within a single dialect, there's variation. The "R" sound changes depending on its position in a word (like "car" vs. "carry").
So, while everyone might pronounce "R" in their own way, it's unlikely anyone pronounces it exactly the same as someone else.