I know a number of people who have been struck by lightning. It seems like you've got a decent chance at survival if you're not touching anything metal.
Otherwise, unless you know tens of thousands of people there is very little chance of knowing multiple people who have been struck by lightning.
Maybe birthday paradox or something similar at play? Only 64 commenters but appears more common than your belief would indicate.
I bet if you are a regular golfer you would know more, and if you spend 100% of your time in a concrete jungle you would know less.