Bloggs if they were coming in from SYD the visual procedure for rwy34 it is still via the star with the height requirement at sheed. However if they were off the star on vectors dif story for sure.
The point is, they weren't doing the visual star, so SHEED doesn't come into it at all.
From the flight track it looks like they were tracking round the arc from BOLTY, saw a runway out the window, and had a go at landing on it.
(Which would be kind of ironic, when you think how many visual approach cockups happen when we get tangled up with the FMC and autopilot modes, instead of just looking out the window and flying the thing.)