It’s a result of the avalanche of SEO crap results that you normally get in Google searches. Wikipedia and StackOverflow are good too, but don’t always have the information you’re looking for. My top 4 resources are GitHub, Wikipedia, Reddit, and StackOverflow.
Reddit is a catch-all for communities nowadays, where you can generally find authentic questions and answers to most common problems and discussions about most common topics.
Personally I trust (some parts of) Reddit far more than Quora, where the content seems to be largely SEO/marketing crap and not authentic.
Reddit does have the same SEO/marketing crap content, to be sure, but it has a lot of authentic content too, and I find it’s generally easy to tell what is what.
I guess for me it boils down to authenticity being more important than authority or expertise, because one of the largest problems with the web today is inauthentic content, content where the author has an ulterior motive.