Ahhh, the non-towered aerodrome debate.
every instructor seems to have a different oppinion these days!
More instructors need to read the AIPs/Jeps. Rep, you are correct.
· Climb to circuit height, then turn 45 ˚ in circuit direction if departing same direction as circuit (AIP ENR 1.1 - 59)
My understanding of this requirement is it makes your departure wider than the circuit, keeping you further away from the circuit traffic.
Follow the recommendations, but do whatever is safe and sensible.