Maybe the reason "must work or study from home unless it is not possible to do so". Learning to fly a plane is a bit difficult to do without actually flying one occasionally.
Not making excuses for them as I really don't know why.
Perhaps the real question is "why are Victorians so mindlessly compliant with the illegal regulations from Chairman Dan?"
I would expect that ALL flights at flight schools actually training students to fly would qualify as an exemption. Private flying obviously not I would guess.