I'm not as sure about that. From everything I can find, fewer than 10 of 134 were lost in weather. New variants of the K-class were fielded after WW2, and the navy didn't retire the class until 1959. This was one year after air-to-air missiles saw their combat debut in the Second Taiwan Strait Crisis.

Airships continued to see active surface until the entrance of anti-air missiles. It's hard to see at that point how they could compete with heavier-than-air aircraft which were much smaller and faster.