Few things that are constant are appreciated for long. Sun in California is much too commonplace. "I love you" loses meaning over time. But there is some comfort in the constant. And fleeting, ephemeral beauties are sad and fearful. Which is why people love the ocean.
Waves are never quite the same. Each one is unique, and always changing. There and gone in a few seconds' time. But they are never more than a few heartbeats apart, and rarely much different from the last. The ocean strikes balance between the dynamic and changing and the constant and reliable. And we all love balance.