Why does the Andoid client purposely limit itself to photos and videos?

I can’t seem to understand this. Seafile is a serious general file synchronization tool with class-leading security and performance. Why does the Android app limit itself to photos and videos? It made me question my understanding of Seafile. Did I miss that it was an aspiring photo sharing app or social network? Will the syncing features eventually be phased out? Is it as secure as I thought? Others have thought the same: Android App: Uploading PDF from download folder? - #3 by Mark_Y_Mark.

I would like to know, what was the impetus behind limiting mobile syncing to photos and videos only?