I am not sure if the results from an Australian survey would be replicated in other countries. Australia as a whole have had relatively low rates of the virus, just a few hotspots such as Melbourne.
They haven't had the everybody back to work a few weeks ago, to be followed up with a please go back to working from home where possible because of a second wave that we are currently experiencing in the UK.
Its much less risky to plan for continued WFH for the foreseeable future than risk getting staff into offices and then a second wave meaning you have to quickly enable WFH for them