gotta say lifelines have saved me more than hurt me. ya they are uncomfortable and ugly but if you do more than just fair weather sailing you will one day find you need them. I've seen 7 lives saved by lifelines in the blink of an eye (2010 southern straits) and at least another 5 saved other times. the only time they haven't helped was after a few to many rums.
one hand for you, one hand for the boat and you'll be ok, and sometimes that lifeline is exactly that.