I agree with the author and am happy that there is legislation to regulate the height of power lines. Sadly those in question were placed there before this rule.
But I am concerned that this area in question is used by the Boy Scout troop regularly for sailing with the known hazard that close and not clearly designated as a "no-go" area?
Of course, it may be fine 99% of the time, but unusually high water levels brought the mast in contact with the lines..
I recall an A-cat regatta where someone wheeled their boat into a power line at a rigging area. Spooky but no one was killed if I remember correctly?