Agreed, interesting...
I read the passage "....It's clear to me that both our pruning standards and the training we give to our arborists need to change - to take into account the effects of natural braces. Ultimately, we need to make our arborists aware that tree work like this can leave a tree more dangerous after pruning than beforehand...."
As being the "purpose" / "output" of the article?
If that assumption on my part is anywhere near accurate, I'm not at all sure I'd agree (fully) since for the thesis to be supportable, it can only be applied / justified where several coincidental circumstances exist - crossing (fused or otherwise) branches AND an included union (or other such feature as might be deriving some degree of support from the assumed brace) AND a target that might be exposed to assumed increased risk of failure of the feature that was possibly being supported by the brace.
And of course, it might be better to target the proposed training to the surveyors writing the spec rather than the arborist (define arborist!) doing the cutting. Especially, as exampled in the article, utility cutting.
How common are the circumstances described in the article? I'd suggest they would need to be actively sought rather than being commonplace. I'd have some difficulty reconciling a recommendation for broad reaching changes to pruning standards and arborist training off the back of (a) such a specific (and (assumed) not so common issue) and (b) from the example of utility cutting in the article, perhaps surveyors rather than cutters would be the better target audience and © if there exists a sufficiently significant hazard feature, perhaps felling should also be in the equation?
Then....
Assuming a surveyor correctly identified an included union (possible hazard feature) but recommended no pruning of potential bracing limbs, then the main hazard feature failed leading to damage / harm...
All "what-ifs" of course and each tree, target area, amenity assessment and surveyor tendencies to their own specific circumstance.
Will have to look out for the forthcoming workshop series!!