This was originally disallowed because #5907 was opened asking for different behavior in this situation that we didn't want to allow, and so we decided to make it a compiler error rather than have confusing behavior in that situation.

between an orange juice blender (a juice blender that’s orange) and an orange-juice blender (a blender that makes juice from oranges)

But others, including Garner, believe, I think rightly, that while it can be ok to omit the hyphen in compound-noun adjectives, the better practice is to include the hyphen to ensure no confusion (especially since including the hyphen never triggers a miscue).

Without the hyphen the reader is left wasting time wondering “what’s the real meaning here?” Without the hyphens readers struggle to get your meaning right, which slows them down. The hyphen eliminates the ambiguity, and tripping over it.

I interpreted it more like "you can (for example) use serverFetch for external resources", rather than "serverFetch is exclusively for fetching external resources"

Verb plus noun is the winning combination. Describe what the link does and what it gets you: <a download href="downloads/fonts.zip"> Download Fonts </a> By itself, the verb Download would only signal what behavior will be triggered when the link is activated. Including the noun Fonts is great for removing ambiguity about what you’ll be getting.