yes, it does indeed use pdf2docx under the hood. From a technical point of view, it doesn't do anything new asides from straddling Python and Electron into one App.
However, from an everyday user point of view, it does make it rather simple to convert pdf to word document. An everyday user won't be up for doing that via cli commands. And every alternative user friendly solution requires uploading your documents to servers (which could spark privacy concerns)