User blog comment:Fliu/Chapter 957: More Info on Rocks/@comment-7614831-20190927204814/@comment-108.83.222.210-20190928235439

As readers we are rather lucky that we are able to know things before other characters do including the main cast. There have been comments in the past inquiring about people knowing of Luffy's resilience to poison or lightning, or the fact that the Sunny can fly. We are the audience, which means we need to be kept in the loop to a degree more then the characters until the information becomes relevant to them. That being said, I expect that we are being told these things because they will become relevant in some way shape or form later on.