You can comment on 1 aspect of it of course, but putting in a couple of sentences is not a full debate stance, that's the kind of comment used in other regular discussion topics.
This section is meant for in depth debate, for those who want to not have a simple discussion but make clear, detailed posts about their opinion. If someone can't put a lot of detail in their opinion or post, then it will be removed.
You can definitely debate only 1 part of it, so long as it's explained and groomed in detail. That's one of the major differences from this section and a normal discussion.