He just gave you a reason.

Whenever you post an idea, you might get a few upvotes, but you'll also get a lot of comments saying that something else is a better idea instead.

If you organize content, you would get rid of that sort of things. Imagine going on reddit, to math subreddit, and commenting on some theorem "yeah, but it's better to develop new political system than solving these equations". It's just bizarre, and for a reason: not everyone on this world should be solving the same problem.