If I ask you to turn around to the right, are you going to ask me what side of you I’m referencing?
No, because humans have a pretty clear forward direction. Screws don’t. You say turn a screw to the right, do you mean make the top of the screw move right or the bottom move right?
Most people assume the top, but not all, and the language is ambiguous.
The bottom arrow is, definitionally, pointing left.