That's a bit confusing to me.. If you take the turns around the windward winch, then you can use the winch handle and stay on the windward side....
Of course you are right. but if you are in hurry or the handle is on the other side or you just don't feel like it it, or you lost the handle it is good to know that sweating a line like they did on the old ships before winches were common still works.
Just another simple old time trick that might come in handy.