They both work and each has its advantages. I don't necessarily agree with your premiss that SOTs are short and stubby and SIK (sit in kayaks) are long and narrow. The Cobra Expedition is 18' and 23.5" wide. Its a very fast SOT. The WS Critter is under 10' and 30" wide. The very popular WS Tarpon is a fast, wide SOT at 16' and 30". There are so many kayaks around now that its really hard to generalize.
On the whole I prefer SOTs. I'm primarily a fisherman who took up the kayak to fish. I enjoy kayaking but you won't find me on the water without a fishing rod. The SOT is more versatile and will go anywhere a SIK can go. In many fishing situations I find that I'm getting in and out alot like on the flats or going up a shallow river, etc. A SIK gets old. Also when the temps are real warm so is the kayak. I can dress for the conditions but I can't get more air into a tight ****pit. Lastly SOTs are much better for launching through the surf. If you dump you fall off. You're not a part of the kayak so to speak.
As I said above they both allow us to catch fish.
On the whole I prefer SOTs. I'm primarily a fisherman who took up the kayak to fish. I enjoy kayaking but you won't find me on the water without a fishing rod. The SOT is more versatile and will go anywhere a SIK can go. In many fishing situations I find that I'm getting in and out alot like on the flats or going up a shallow river, etc. A SIK gets old. Also when the temps are real warm so is the kayak. I can dress for the conditions but I can't get more air into a tight ****pit. Lastly SOTs are much better for launching through the surf. If you dump you fall off. You're not a part of the kayak so to speak.
As I said above they both allow us to catch fish.