Thanks Ixixly. However, my point is that the regs say that for VFR I'm not required to have AH just a T&S (plus the other primaries). So the answer is not in case my primary AH fails.
I have considered passenger comfort as a possible answer but the same rules applies to Airwork without passengers.
Also, I'm not suggesting anyone remove any equipment. My question is no more than an attempt to understand the reasoning behind the regulations. (Notwithstanding many of comments on this forum, I believe that most of requirements we have are for good, if sometimes obscure, reason. Naive perhaps.)