Lightning is unpredicable if, for example, you assume all grounds are same. The phrase was very specific. Earth ground. If any appliance is earth grounded, then it is the perfect path for a destructive surge. But appliances are not earthed grounded. Appliances connect to a completely different ground - the safety ground (code calls it equipment ground).
The house is full of ground: motherboard ground, chassis ground, floating ground, analog ground, etc. Some are interconnected. Others are not. And yet every one is electrically different.
The incoming path is obvious. But what is the outgoing path to earth? Even wire length and wire splices affect that answer. Damaged are appliances that make a best connection to earth ground. Removing the safety ground from any appliance does not change protection or risk to that appliance. Addressing the earth ground does.
Properly noted is that millimeters inside a switch, fuse, circuit breaker, etc do not seriously impede a surge. Because surges are not voltage sources. Destructive surges are current sources. That means voltage increases as necessary to blow throught anything that might stop it.
How to protect a Tesla? What is the path to earth? Is that path destructively via any appliance or Tesla? Anyplace that question is answered means even direct lightning strikes without damage. But again, earth ground is electrically different from a safety ground connected to appliances. Not knowing that is but one reason why lightning is confusing or mysterious.