good question.. i really enjoy sharing my opinion for at least two reasons.
1) if i have the best recipe for apple pie, i think i should share it. same goes for if i have an answer to any of life’s little problems/questions. help where you can.
2) by sharing an opinion (or on this site, an “answer”) you get to throw yourself to the sharks to see if your way of thinking is sound. if it is sound, it should be able to stand up to close scrutiny. If it is not sound, then why would i want to hold on to it? I would hope that if any of my deeper understandings of the world around me were wrong that someone would readily tell me so that I could stop living my life as a lie.
i’m a truism seeker. :)