I answer posts all the time. Check some of them out if you want to. I only have my own experience & opinion to go on, and sometimes it is nice to express it. My answering posts comes in bursts depending on my own circumstances.

If you have an opinion, this is a good place to express it. It is what it is.

Maybe look for those posts that a person asks specifically for input. They are information gathering, and are interested in all points of view, usually. Even though we don't always think so, our opinions matter. Try it out!