It seems very unlikely to me that any electric magnetic event could simultaneously destroy modern life while at the same time cause minimum damage to human life

It seems very unlikely to me that any electric magnetic event could simultaneously destroy modern life while at the same time cause minimum damage to human life. One of the biggest concerns with massive solar storms is that they will cause firestorms in things connected to the power grid. If its not strong enough to do that, then it is unlikely to have the penetrating power to reach all electrical systems.