Hull sections in K1 kayaks?

As sea kayakers we would demand our kayaks to have hull sections that prevents the kayak from beeing flooded. Typically the hatches do this work for us. They are also excellent places to store our camping gear and food. In the worst case senario a fully flooded kayak would dive forward an unknown distance from the location where it was seen for the last time above surface.

The Annual Gullö Runt was paddled for the 27th time today. The distance is 20 km, starting from Ekenäs and going around the Gullö island. More than 60 paddlers appeared to sunny Ekenäs. 18 of them were in the so-called competition class, and some of them are officially competition kayakers that train hard almost every day. The fastest paddler did the round in 1 hour and 24 minutes. They paddle K1 kayaks and the like. Myself decided to use the SeaStrip, a strip build kayak of my own design. It is fast, but I might not be the man to paddle and maintain the speed of the top paddlers. Starting to consider myself a recreational paddler in comparison...
Considering I did a K1 paddler rescue while "competing" my total speed of 10 km per hour was not too bad.

When bracing on the K1 for the rescue from my 38 cm wide SeaStrip I noticed that the K1 kayak had a hull section wall behind the seat. Would I have known I might have emptied the water before the rescue, but I did not. It bugs me I did not emty the water! I also started to wonder why hull sections or bulkheads have not been introduced to the K1's for common safety. A Swedish competition kayaker diseased in the winter of 2008 as his kayak was flooded. His fellow kayaker had no means of getting him out of the cold water, but the kayaker died of hypothermia while being towed to the shore. Had there been bulkheads - the flooding would have been minor and even without emptying the kayak he would have been able to paddle or be towed ashore, and in a fairly good shape for final recovery. So why don't K1 builders start adding bulkheads?