Prevention feels unnecessary right until the event it would have prevented.

The whole difficulty of prevention is that it always looks unnecessary in advance and obviously necessary in retrospect. Right up to the moment of failure, the evidence supports doing nothing, since nothing has gone wrong. The decision has to be made against the apparent evidence, on the basis of what is possible rather than what has happened.

Choose one preventive action you have been declining because nothing has gone wrong. Do it anyway. That is what prevention costs and it is always paid in advance.