When it comes to lightning, there's almost nothing that's guaranteed protection, except not being in its path when it strikes.
Rubber tires on a car, or rubber soled shoes means nothing to lightning. While it generally takes the least resistant path to ground, it doesn't always. Remember, it's already arcing, in free air, a half-mile or so. Half an inch of rubber is nothing to it. For every story you can find of someone being "saved" by this or that, there's another story of lightning seemingly going out of its way to kill someone or strike something.
I've had it strike a tree 20 feet away from me. That was an experience I'll never forget!
