In fact, your reply does not contradict my view on the matter.
We all pass by these plateaux for certain techniques, and no matter what we do, we need to wait for the technique to mature in our head before we are able to do it. The duty of the Sempai is to show the technique to his Junior as correctly as he can and as often as he can, sort of showing him the good example. If he does not get it right, insisting and pressurizing him would only lead to his frustration. Just letting things fall into place naturally would be better.
My opinion is based on my own personal experience. Probably there are some people who like to be verbally taught by their Sempai during class, but not me. I prefer the more subtle way of mute demonstration