Roughly, there are two camps. Those who say that any well-formed, non-dup question of interest should be let in and those who think it's a stop of last-resort after checking all conceivable documentation and scouring the internet.
I believe the latter viewpoint is pretty run-of-the-mill developer machismo, and it makes me chuckle every time the first google hit directs me to a SO post with 1000 upvotes that has been closed as "off-topic".
It seems self-evident to me that in the year 2015, the internet has allowed me to make more valuable use of my time quickly searching for answers rather than scouring documentation. Docs have a time and a place, but are not needed for quick dips into the myriad techs you need to use to write a typical app these days.