What's ranked at the top of Google may not be what Google thinks is authoritative but what Google thinks will answer the query. Many queries support multiple user intents, dependent on the person making the query.
That said, Google has a long way to go for satisfying user intent. Google routinely lets me down when I search for angling information. Too often, when I want information I get product pages. Searching for specific objects, like learning about the history and uses for certain fishing flies yields page after page of fly tying pages, no matter how longtail I fashion the query. I know there are several authoritative sites out there that are about the flies and their history, but Google doesn't rank them consistently, no matter how I fashion my query. I suspect it's because most people making the query are satisfied by sites showing recipes on how to tie the specific fishing fly patterns.
It's frustrating that the authoritative sites for my highly specific longtail queries get ranked behind sites that I don't want. My specific user intent is overriden by what Google's data understands satisfies the majority of searchers. In my opinion, Google's algorithmic attempt to understand user intent false short. It does not understand my intent, it is overlaying the user intent of the majority over my query and showing me the results appropriate for them but not me.