The important point isn’t that there’s a wild card, it’s that there isn’t an undefined clause. You know with compiler-assured certainty that WYSIWYG, which is a big step in code predictability.
In this case I wouldn't call the command send the mail unless status was explicitly Accepted or Rejected.
But as notes above, the important part is that the compiler doesn't let me forget about all the possible cases (e.g. `Queue` in this example).