And the comment-section on those type of post isn't the right place for a "philosophical" discussions that would otherwise be on topic for that sub/community, but exactly align with topic of that post or news article.
Can you explain why you believe this? I've always understood deep dives into the topic or context or general issues raised by an article to be fair game, whether we're talking the comments on the news article itself, a link on Reddit, a link on Hacker News, a link on a vBulletin/phpBB forum, or even old newsgroup/listserv discussions.
Reddit's decision to start allowing "self" posts that were only links back to the comments thread itself (showing just how link-centered the design of reddit originally was, that every post had to have a link to something) came after the discussions around links became robust enough to support comments-first threads.