How is ⌘A much easier that ➤?
Just press right arrow to move to the end of the selection.
In any event, it is either ⌘A to select the selection and then type a replacement, or Right Arrow (and probably space) to refine the selection.
The reason it is selected at the start is because the typical use would use the other controls of the action to handle refining what is available - you can refine the available macros by specifying macros, groups or smart groups int he action.
The initial search is designed essentially to give you a default., which is selected so it is easy to override.
It is not inconceivable that I might add an option to search only by name, but given how easy that is to do now, and how generally it is better to provide more options than less, and how the action already provides methods for limiting the scope of the search, and how I would then have to consider how to handle search filter elements in the case where the action is configured to search only by name, I'm not sure I ever will implement that.