Clicking on things is the primary and often only interface that most Windows programs support. And frankly it can be much easier to script some actions with something like Java's Robot class than to dig through the cesspool that is MSDN trying to figure out how to get the same simple things done with the overly-complicated and poorly documented COM interfaces that might or might not exist.
Also, I'm not sure which is more embarrassing, having to write code to interact with the GUI or having to write VBA code.
Also, I'm not sure which is more embarrassing, having to write code to interact with the GUI or having to write VBA code.