I don't agree that commenting is always useless because on occasion I've actually learned something new and even changed my mind about something as a result of

I don't agree that commenting is always useless because on occasion I've actually learned something new and even changed my mind about something as a result of a reply to a comment I've made. Also if you care about something enough to comment on it, the act of articulating a comment can make you think deeper about it and even uncover flaws before you've even submitted your comment.