Exactly, I really don't see the point of a non-binding nomination and letting the super fund decide where YOUR money goes.
But note there's 2 types of Binding Nomination. Lapsing and Non lapsing. A lapsing nomination expires , as specified by the fund after (usually) three years, whereas a non-lapsing nomination doesn't expire (unless you change or revoke it).
Lapsing nomination is like making a will that expires after 3 years, would you do that? Stupidity really but some funds don't give the option of specifying a non lapsing binding nomination. Hence an advantage of a SMSF.
My opinions only.