A friend of mine told me about learning to use a chainsaw. At first he was terrified of the thing, always super cautious, but over time he got comfortable with it. A bit too comfortable. One day he was too complacent and nearly hurt himself badly. After that he kept using it but had a healthy respect for it. I think both hobbyists and SWs over time lose their caution and then regain it when they get a scare (or worse).