Yes but this paper isn't isn't an island unto itself. It's a nice little lemma that can illustrate a point within the subject of special relativity, from a diff

Yes but this paper isn't isn't an island unto itself. It's a nice little lemma that can illustrate a point within the subject of special relativity, from a different perspective. It could be included as a small derivation in a textbook, or lecture notes, or even broken down as an exercise for the reader. In my experience approaching the same idea from many different perspectives yields a deeper, richer understanding of the underlying concept, and offers a path for someone to reach the big picture understanding you mention.