You may laugh. But in an enterprise, it is the CA's job internally to help manage and communicate expirations to users. If there are 10,000+ certs in an org, you want a tool to manage them.
I've also worked places that used multiple CAs, and that makes it more difficult to manage. This at least can pull the info in based on what the server is actually using, and puts everything on one screen, regardless of the CA it came from.