I think you are rationalizing. I think you simply want attention and praise and don't care so much about specific feedback. But I disagree with Vladimir: explicit personal attention and praise, while uninformative, are useful; they are better motivators than karma points.

I am also skeptical of people's ability to tell you useful things about what they liked in an article. No one is going to tell you that they were convinced by the irrelevant picture of a brain.