Oh you mysterious wise men. I probably should have listened to you sooner.
See, there is an incorrect implied meaning here. People normally take this quote to mean that sooner or later you will slip up and get hurt when you are doing something dangerous.
But let me introduce a new perspective. This isn't about the people who are doing the "dangerous" act. It is about those watching. See, the by-standers don't like it when the status quo interrupted. Things must be as they always are, they insist.
Then they see those brave enough to walk on coals or swallow fire (literally or metaphorically) and something must be done to dissuade others. What if everyone walked around with that kind of bravery or confidence?!
Be careful walking on coals, because occasionally people have been known to get pushed, assaulted, criticized, or worse.
But the funny thing is, the longer you stay down on those coals, the more your toes get burnt.