It's not an issue about repeating facts, it's an issue about more accurately pin-pointing information in the citation of the source; to make the discerning reader's quest for verification easier. You (presumably) add page numbers or chapter numbers to book references, even though a reader could read through the whole book looking for clues; why not add the keyword (especially if it isn't immediately obvious as in this case) for a search in a web list? And you didn't say the majority (I would agree with that) you said 99.9%; virtually all (and I disagree with that). You also appeared to imply that readers who wanted better pointers must be morons.    

 The assertions? That to supply more information to help readers would mean treating them as morons