Those are all horror to me. I was just watching Starship Troopers, my favorite sci-fi film and even it's end degenerated into gratuitous horror instead of smart sci-fi. Did we learn anything about the bugs or ourselves in the end? No. i would like to rewrite that ending to be more thought provoking, thoughtful and insightful. I guess it's a matter of intent and the disgression of the programmers of sy-fy, etc.. Once again though we're talking about the lowest common denominator (demon eater) here $ and ratings.
Science Fiction doesn't have to be "smart" or "thought provoking". You don't even have to "learn" anything. The key is in the two words that make up the term: "Science" and "Fiction".