Reasons posted were same reasons promoted the ESE protection industry. That industry says pointed rods that discharge air will then prevent lightning.
Meanwhile, research demonstrates that blunt rods are better protectors than pointed ones. But both are irrelevant. That lightning rod is made effective by its earthing.
For example, a FL couple suffered direct lightning strikes to an exterior wall. They installed lightning rods. Lightning instead struck that exterior wall again. Why? Bathroom plumbing connected to deeper and more conductive earth. Lightning rods were only connected to 8 foot rods in sand. Lightning seeks the better earth ground - that plumbing inside the wall. To make lightning rods effective - too divert lightning to earth on circuits that are not destructive - those lightning rods must be connected (earthed) to better conductive soil beneath the sand.
Just like in protectors - the lightning rod is only as effective as its earth ground. Earth ground (not the lightning rod and not the protector) provides protection.
Where he realizes it or not, dnoyeB posted ESE industry reasoning that was roundly rejected by the National Fire Protection Association
- who write the National Electrical Code. ESE industry claims to stop lightning by discharging the air.
What makes a shower safe from lightning? Need lightning pass through a bathroom to obtain earth ground? If not, then any incoming lightning path has been properly bonded (connected) to earth ground so that lightning is diverted (non-destructively) into earth. What makes that earthed connection better? Shorter wire. No sharp bends. Not inside metallic conduit. Separated from other non-grounding wires. Etc.
Protection has always been about diverting lightning into earth where energy is harmlessly dissipated. Any protector or lightning rod that does not dissipate lightning harmlessly in earth is not effective and violates the science as even demonstrated by Franklin in 1752. Where is that energy dissipated? That is what provides protection.