UK trained myself and have much appreciated the off-airfield practice for entering autorotation, chosing a field, setting-up the machine, etc. But we only need to take it down sufficient to be sure that the student would make the field which is nominated. That does not mean (in my experience) down to wire-strike range.
We should not mix off-airfield engine failure drill with low-level flair / power recovery; doing that risks bringing in a wider "ban" than not.