I can agree with Treeman. In the many years that we have been posting stuff here and at other rec sites I have seen very few posting by Researchers and definitely do not remember anyone questioning their methods, practices or ways of doing their climbing.

Because many canopy researchers do this activity on a regular basis (probably daily) they have even more experience than the average Recreational Tree Climber that usually climbs on a weekend or even less and rarely tackles a huge tree like those on your photos.
So the persecption may not be correct that "We" think Tree Researchers are unsafe climbers.
By the way ... thanks for the "_link_" and photos of your research. Very educational!