I see comments like this a lot, but having sailed both symmetric and asymmetrical chutes a whole lot, short-handed a symmetrical chute is much easier to hoist and douse than an asym, and also easier and more reliable to jibe without getting a wrap.
Throughout my racing career my primary role has been foredeck, so I have got plenty of experience with both types of spinnakers. Personally I find symetrics more fun for racing because there is so much more to do, therefore the role of foredeck crew is that much more important. I also know how badly things can go wrong with symetric spinnakers.
Certainly on small boats where you can run a simple set of sheets, and the loads aren't too high a symetric is still very manageable, but you still have the added complexity of the spinnaker pole, downhaul, uphaul etc. Someone still has to go up to the foredeck to gybe the pole. Again, fairly straight forward for an experienced racer as long as the wind and sea conditions are reasonably tame.
Now if you move up to a 40ft or bigger boat, the loads are higher, the pole is bigger, and you likely need to run sheets and guys. So now the person at the back of the boat has to manage sheets, guys, downhaul and uphaul and helm while their partner goes forward to gybe the pole. If you have ever done foredeck you will know how vulnerable you are to losing control during those moments when both corners of the chute are loose. If a mistake is made on the helm it is very easy to broach even in moderate breezes. There is far more potential for things to go wrong gybing a symetric.
Contrast that to an asymetric...you have sheets, and maybe a tack line. Gybes can be done by one person from the cockpit. It really isnt that hard to gybe without wrapping around the forestay! If the wind gets too strong you can just blow the tack, the sail flies like a flag until you gather it up, and off you go. No pole to stow before you can gybe or tack, much less spaghetti in the cockpit, and generally much less stress on the wife!
Sure lots of people prefer symetrics for a variety of reasons, but there is NO WAY it is simpler or easier than an asymetric in any way!
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