Those are typically apps that are used to create new documents, or to edit an existing document, so quite normal to launch with a File Open dialog box.
Or, you can find the document that you want to view (or edit). Right-click on that document, then choose Open With, and select that app that you want to use to open that document. The File Open dialog will not appear at that time, because you chose the app used to open that document. Or, no document, just click the New Document button in that window to open a blank document. And--now you are creating a new document, which you would print, or save (to provide a document that you can then use at some later date.)
Is there something that I missed that you wanted to ask about working with documents?