I quote the book Rappelling -Bob Gaines page 151 --- "John Dill, head of YOSAR(Yosemite Search and Rescue) cites 3 states of mind that regularly contribute to accidents :
Ignorance, casualness, and distraction.
Ignorance is being unaware of a potential danger.
""Casualness is not taking things seriously enough -COMPLACENCY reinforced by getting away with practicing poor safety habits when nothing goes wrong.""
Distraction when something takes your mind off the important task at hand..."
I have heard from the most experienced Skydiving mentors many times "and I thought I had seen it all".
I have also looked up the Accidents North American Climbing and "complacency" as a root cause keeps popping up and the deaths aren't just the inexperienced but many who are probably considered highly experienced and trained up to expert.
http://publications.americanalpineclub.org
A feeling that you are properly trained(a belief that you know enough) in a particular task, able to handle every situation., ie. every type of tree,every equipment combination, every type of time constraint, every type of personality of worker you work with, every type of pushy impatient customer Or Boss, As you add more variables the risks compound or become less foreseeable..
This is just like skydiving, I may be an expert well trained in a discipline say - canopy pilot, but combine other factors a late night , weather, equipment component malfunctions, other inexperienced canopy pilots, conflicting aircraft traffic, ground hazards, etc complexity of risks grow quickly.
Your comfort level will be probably depend on your "assessment of risk" or "risk perception"
I quote from
Risk perception is rarely entirely rational. Instead, people assess risks using a mixture of cognitive skills (weighing the evidence, using reasoning and logic to reach conclusions) and emotional appraisals (intuition or imagination). After review...
www.health.harvard.edu
"Risk perception is rarely entirely rational. Instead, people assess risks using a mixture of cognitive skills (weighing the evidence, using reasoning and logic to reach conclusions) and emotional appraisals (intuition or imagination)"
I'll leave a nice quote "If
a little knowledge is dangerous, where is the man who has so much as to be
out of danger?