I think it isn't, more like "getting an answer/opinion from an expert" would be more appropriate. I think he is using the word "discuss" in informal meaning of "talking".

And I think that Q&A format of SO is actually quite appropriate for that sort of thing; unlike the usual discussion forums, which may get into real discussion of nuances of expert consensus. (Maybe that's where the cultural misunderstanding about SO comes from, that people actually want a site which will give an expert opinion, more or less, without having to read experts arguing too much?)