That's misleading at best (GUI windows apps that technically can be emulated from the commandline often practically cannot be--CLI tools or the registry/config-file interactions required to perform actions that are clearly exposed and well-documented in the GUI often have nonexistent or terrible documentation. In even marginally complex apps, this puts the effort required to script the functionality of the GUI on par with the effort of reverse engineering it--and that's Microsoft-authored tools and Windows functionality, which is worlds ahead of most third-party software in scriptability) and just plain false at worst (huge swaths of stuff just don't have APIs that are accessible without writing and compiling code--PowerShell and very aggressive pushes by Microsoft for WMI/CMI and WinRM more recently have only just begun to erode that).