I agree with BobL.
I cringe every time I read a guy saying how long he's done something and no one is going to tell him that there is a better way. I don't believe that anyone is 100% safe, 100% of the time, regardless of how often you do something. We become comfortable with the everyday risks we take and sometimes overlook or undervalue the actual danger involved. Take a poll, for example, of the number of people who think they are better than average drivers. It comes out to about 80% who think they are. That simply can't be. We all make mistakes driving, sometimes with bad results. Most of the time nothing happens, but occassionally something happens because we screw up or even for events that are beyond our control. That, to me, is what additional safety features should cover. Few people are more careless drivers because they have a seatbelt or airbag, but these features are there for when crap happens. Same as a brake on a saw - there for when you need it, not there to make up for other shortcomings. I see few reasons to avoid safety features on cars, saws, power lines, etc. I'm not saying that people don't have good, legit reasons for avoiding safety features, I'm just saying that there are fewer legit reasons than people give.