Stiff,
Because these kind of incidents, of varying seriousness, but effectively initiated by Regional crews, and not the dreaded "blundering bug smasher" ( an increasingly rare and endangered species) are relatively common.
The big difference with this one, is that it was actually reported. Most aren't, as far as I, and other interested parties, can determine.
The revised CAR 166 ( complete) has improved things a bit, but the essential mindset of "radio procedures", as opposed to "communications" is still a major problem with training and subsequent operations.
Tootle pip!!