I don't think that's anywhere near equivalent. That's for reading and writing Microsoft Office docs. It has no office functionality. LibreOffice has a full API, for example to run calculations on spreadsheets [1].
The goal of bringing in dependencies is so you don't have to duplicate the functionality, in this case, crafted over decades of effort.
The goal of bringing in dependencies is so you don't have to duplicate the functionality, in this case, crafted over decades of effort.
[1] https://wiki.documentfoundation.org/Documentation/SDKGuide/C...