Don't blame it all on farmers. Logging operations, suburban development in the outskirts of cities and towns, clearing for mining projects and even some renewables projects also lead to habitat destruction and fragmentation. All these factors lead to death by a thousand cuts. Koalas need sizeable areas in which to roam for food and to create new territories once they leave their mothers' care. The article explains some of this as does the video. There are farmers who may not care and just want to clear the land for cattle or whatever else (at their own peril ecologically although they don't see it that way) but other farmers care a great deal and we have to keep encouraging and incentivising them to plant more koala trees and other native vegetation for all our wildlife, including the insects, birds and some mammals like flying foxes who help with pollination.