Quite so. Nothing will protect you from a direct or very close hit. However, proper grounding goes a long way to avoiding such problems. One thing a lot of people don't realize is there are often electrical currents in the ground, even without lightning. For example, a charged cloud can induce ground currents long before there's any lightning. There may also be currents due to power lines or street cars. By connecting everything to a common ground, you reduce or eliminate problems from the various sources.
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