That was my choice of words and maybe not the best.
In the circumstance I described the boat would be virtually stationary with the bow facing the bank. The purpose of a quick burst of throttle against a rudder angled at 45 degrees is to get the stern moving toward the bank without driving the bow into the bank. Similarly to arrest the forward motion a quick burst of reverse will retard the boat without sending a wave of water between the boat and bank that will push the boat away from the bank.
A consistent part of the teaching was to start manoeuvres from a slow speed and keep the tiller at 45 degrees using the throttle to change the rate of turn, but always starting with a burst of throttle to get the boat turning in the first place.
I did the Helmsman course 45 years after first going boating and 6 years after buying my own boat. I found it very well taught and useful. That was not what I’d expected.
Unfortunately I can’t recommend the training provider, Willow Wren, because they no longer exist as a training entity.