I don't get that exclusionist attitude either. If they think its subjective, why not just tag it accordingly, or move it into some sub-forum instead of outright killing the discussion.
Because they'd have to exclude it from search because it'd affect the results
People might like it or not, but SO is a tool that provides fast access to answers on technical questions because people want to solve their problems(and learn), it's QA.
If you want to discuss stuff then there are forums, reddits, discords or even HN.
How many times have I googled a question only to arrive at a closed SO question- too many times. It's truly annoying. Plainly people do want to discuss things on SO.
it's not meant to be a discussion forum, it's more a database of questions and answers ideally written to Wikipedia type quality. It gets a lot of hate for its quite strong moderation, however, it's ended up one of the best resources to find answers to programming questions, so they are doing something right.
