You don't 'not go' because you might be poorly placed for periods of time - you go having acknowledged the risk.
But that's pro military flying. I fly for pleasure mainly, everyone who flies GA has their own risk assessment to flying. I have no problems whatsoever with people flying at low level around Wales, that's their choice and I would defend their right to do it. However it doesn't mean that I would do it.
I don't wear a nomex flying suit or crash helmet when flying, to some that would be an unacceptable risk.