Tennis Shoe in the Final Scene

What is the purpose of showing the tennis shoe in the tree prior to Jack's dying scene in the bamboo forest? It is certaintly alluding to the pilot episode to indicate this is the same location where we first found Jack but is that the only reason for the inclusion of this image? Or is it also a red herring, suggesting something about that original plane crash and the pilot epsiode? Not sure, I may be looking too far into this.

I felt this to be particurarly confusing also because of the plane wreckage image they end the show this merely an homage to the pilot episode and the genesis of the show or is it again hinting at something else. any ideas?

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