Don't we? I distinctly recall that when I was using a left-handed mouse on WinNT 4 in the nineties, the mouse pointer was reversed? Whether that was the original cursor or just someone at IT being a leftie and installing a custom cursor, though, I have no idea.
I later found it much better for me to simply use my right hand for mousing about, leaving my left hand free for taking notes.
I later found it much better for me to simply use my right hand for mousing about, leaving my left hand free for taking notes.