Sure, it's not for everyone because there is social pressure to leave a kind word for others in your community, and there are other free exchange groups that may fit your style more. No one is required to explain why they need something, but a lot of people feel comfortable saying "my daughter would love this" instead of a lot of "me"s and "next"s. It's a weird vicarious dopamine hit for everyone else reading along; hard to explain if you haven't experienced it.