Having worked for a PoCo for a few years, I can agree with what you are saying.
Tying off to a thing like a pole is just not done here, when working from an EWP (Bucket truck).
You are required here to tie off your Safety Belt, only to the side anchors on the side of the Bucket.
There was a serious accident here some years back, where a pole gave way, half-way through a Hot-Stick job and one of the workers was pulled out of the bucket as the pole fell to the ground.
The guy is in a wheelchair to this day.
Considering that most Bucket trucks thes days have a Double Redundancy system built into the Hydraulics, there is no need to tie off to anything apart from the Bucket.
Our bucket trucks undergo a rigorous test every 3 months here and they haven't failed once.