Complex sentence: While the image doesn't matter much to the reader, as they can reach the by simply clicking on the image, it is helpful to other contributors and for maintenance of the encyclopedia if images have descriptive or at least readable file names.
Split into simpler sentences: While the image name doesn't matter much to the reader (they can reach the by simply clicking on the image), it matters for editors. It is helpful to other contributors and for maintenance of the encyclopedia if images have descriptive or at least readable file names.