google drive backups

[alang]

As per https://help.locusmap.eu/topic/38931-google-verification-status-and-google-drive-backups.

Can anyone explain technically why backups to google drive are being axed, when far as I can see there is no need for full google drive access just to do backups (and restores)?
With the "own files" (drive.file) access an app can create, list, modify, delete app created files which should be all that is needed isn't it ?  Verifying the app with google for that access should be straightforward. Other apps have done that.
There are no doubt other functions in LM which need full access, so these would have to be stopped, but including backups in that seems like "throwing the baby out with the bathwater".

There are workarounds of course so not the end of the world, but I'm just curious about it. 
For example with tasker , which does not have full gdrive access and can only access files/folders it has created itself on gdrive, I can sync all LMs backups to gdrive and then list them,  download them or delete them using tasker. So why can't LM do that itself, without needing full gdrive access?