Re: WHY?
What? There is obvious benefit even for chunks of LibreOffice to be available as webassembly modules:
- Parse documents from a variety of formats
- Exporting to ODT / ODS / ODP, and a variety of other formats
- Manipulate documents
- Render docs as PDF
- Generate reports
- Utilise the spreadsheet engine
- Utilise the grammar checker
etc.
It doesn't impact the desktop so why do you care?
And even supposing Libreoffice offered access to the suite through the cloud, you're saying there is no gain for users either? Yes such a service would have to have security just like any web software.
That is besides the point really since it doesn't stop you using the desktop version. And who knows, perhaps if LibreOffice could make cash from selling software as a service to those who want it would help fund further development of the project as a whole.