This statement supports the author's argument that fishermen are A) dedicated
Explanation:
The statement insinuates in a rather roundabout way that the people who work the profession of sailors are so engrossed by the poetically beautiful scenes they see and the inherent nature of the job for discovery.
They become by nature very inquisitive and always ready to work on their field, thus there is no way they can be lazy and not wake up startled and alert when their door is broken into in the morning.
They are far too alert a people for that.