Because the peak agricultural bodies represent the agricultural industry; they don’t represent farmers.
The agricultural industry consists of Petrochemical companies providing fertilisers and herbicide, machinery manufacturers and biological media providers.
The farmers, who are the ones who are doing the work, are only the consumers of the agricultural industry.
It is like expecting a Chamber of Commerce to respect the needs of the workers.
The issue is that a lot of people consider WFH to be “stay at home and don’t do any work”.
You can usually pick them out because they are either; Extroverted and spend more time at work socialising than work.
Most people in Management/Decision Making roles also suit this profile; they project their own unmotivated malaise on their employees and assume that all their employees would behave exactly how they would.