Hi Kat
The assessor is offering an 'opinion' - so yes they are allowed to say so.
On the surface it can appear to be a perfectly reasonable comment, however, driving a car and trying to pull on socks or trousers, or shoes etc, require different hand movements and dexterity particularly when using reaching aids. So if you want to challenge it, then do so. You need to make it clear why you don't use aids.
BIS
Nothing on this board constitutes legal advice - always consult a professional about specific problems 
