The thing to remember is the the National Titles race is not and has never been promoted as a downwind race. It is a Distance race. And when you look at the ISA World Titles for which this event is the qualifier, that distance race runs around the outside of an island on a lake if I recall correctly, so also not a strict point to point downwinder.
But I take your point, an ocean race over 20km or so that is not downwind the whole way or even most of the way is nobody's idea of a good time. On the other hand, here in Melbourne, we had a fun downwinder in 20 knots with 30 knot gusts today so that will do me just fine.