Isn't the point of resource forks to store structured data; like a font bitmap? The pictured font looks like a third party font, suggesting whoever exported it for release chose to export in such a way that data was only stored in the resource fork, perhaps as a lazy-man's DRM
It's a font in the old Suitcase format from classic Mac OS-- it's not a lazy-man's DRM; it was the way fonts were supposed to be stored. Fonts were resources, so their data went into the file's resource fork.