Just to add that you can always limit those perms yourself if the maintainer hasn’t the time. You can create an override by copying from
/usr/share/applications/appname.desktop
/etc/sailjail/applications/appname.desktop
adding a permssions section to the latter like:
[X-Sailjail]
Permissions=UserDirs
containing the reduced set of permissions and presto, less lax perms.