Each bit of news potentially fires up a moral parade, where people recite prepared speeches.
Often the speeches begin explaining how what someone said is like this other thing, then basically recites a canned story about that thing.
You could give each story a number, and just type the number. The computer (Facebook) could then get the text and insert it into the comment for you. Discourse could happen much faster.
Eventually Facebook could predict what you'll say and just say it for you. Like the self-driving cars Google is making. You'd sign onto Facebook and see in your notification drop down menu "You have commented on Betsy Guernsey's post."
You could read it if you like, but eventually you will know that Facebook correctly stated your opinion.