I for my part always seek to make any kind of comment, opinion or criticism in an original way and what I really think. You are right in your publication, every day we find very short or empty comments that really do not convey that feeling that at least you took the trouble to read the post! The idea is to provide good "feedback" in this community.
Glad to have your input and thoughts on the topic.
The whole idea of this platform is social interaction. Up-votes are a bonus! Like been paid for providing worthwhile posts. Posts that inform and provide entertainment.