Lightning has traveled (maybe) far down a street on AC electric wires. Those wires (obviously) enter without any earth ground. (Only one other incoming AC wire has an earth ground.) That current on AC power wires now approaches every appliance ... hunting for earth ground.
One excellent path is through an appliance connected to a phone line. A best and destructive earth ground connection because all phone wires are required to connect to earth ground at the subscriber interface. Or in simpler terms, phone lines have effective surge protection installed for free.
Surge currents may have found other paths to earth - destructive or harmless. But that is irrelevant to your question. A surge, all but invited inside, may find an earth ground destructively via phone line connected appliances. Damage is often on that outgoing path - that appliance's phone line connection.
This concept was originally demonstrated by Franklin. Damage occurs when a current connects to earth via destructive paths (a household appliance, a brick chimney, a wooden church steeple, a satellite dish). Effective protection is always about connecting that current to earth on a path that remains outside and is not destructive.
To protect structures, that connection to earth would be a lightning rod to earth ground electrode. To protect appliances, a connection to earth must be from every incoming wire (overhead or underground) to an earth ground electrode.
Please stop the emotion. Only thing condescending is how you read technical facts. Reality is technically honest. Too many have made conclusions only from observation. We were all taught in school science that such conclusions are also called junk science. That is a hard, honest, and technical reality. Do not confuse that with silly emotions.
These concepts were originally introduced in elementary school science. Unfortunately, many forget the science; believe advertising.
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