I have had three pedal breakages and numerous (turbo) fin mast breakages in several (6,7?) years of Hobie kayaking.
It is hard to compare usage but FWIW I am 6'2" and reasonably fit and my drives get pretty regular pretty hard use (several hours most weekends, occasional long trips, relatively high average speeds -depending on distance 3.5 to 4.5 knots GPS with a well-laden boat)
It is invariably the case that these breakages occur when you least want/expect/can cope with them and there's no doubt that in my experience they occur most frequently when you are pushing the drive hard... Exactly what happened with my most recent breakage which was a pedal at exactly the same point as the picture above. My experience has led me to the conclusion that if you push the drive hard you are likely to experience more breakages and these are likely to occur while the drive is being pushed hard.
So while it is difficult to compare usage, it is pretty obvious that big strong legs are going to be able to exert more pressure on the drive than small weak ones. So if your pins are in the former category it might be worth holding back a bit...
It is pretty obvious that the failure points in the pedals and finmasts are at the point where the component is weakest or the stresses are greatest - all my broken pedals have failed around a pin-hole (2 went at the top adjustment pin hole & one went at the bottom screw hole) and in my experience finmasts invariably fail at the point where the mast exits the sprocket assembly.
It might be possible for Hobie to beef up these areas or to replace the materials with a stronger alternative but my take on the problem has been to
a) moderate my pedalling: I no longer push my drives as hard as I used to - e.g. I do not any longer use my kayaks as a way of getting aerobic exercise by "putting my head down and going for it" (that treatment is meted out on my push bike) but take a more relaxed approach and try to enjoy the trip. Also I no longer try to accelerate hard to catch waves or get through surf. Funnily-enough this has resulted in little if any reduction in my average speeds.
b) make my drives more easily maintained in the event of a breakage. The top half of my drives (above the centre pin) is the latest incarnation with the easy-to-adjust cables but the bottom half, below the pin, has the old stainless steel cotter-pin sprockets. I have done this because replacing a broken cotter pin finmast is orders of magnitude easier than replacing a screw-in finmast & sprocket assembly... Especially at sea.
c) always carry a comprehensive set of spares and a toolkit on board - spare fin-mast, spare cables, spare cotter pins, spare nyloc nuts, and on longer trips, a spare pedal. The toolkit includes adjustable spanner, non-adjustable spanner, pliers (for cotter pins), allen keys (2 sizes) for drive and pedal replacement.
I have to say that this strategy has reduced the number of drive breakages ( especially finmasts) considerably and has vastly improved my peace of mind when out at sea. Breakages do occur and, while they are frustrating, they are usually pretty easily dealt with in minutes and are no longer anything like as critical to my enjoyment or safety as they used to be.