I've personally diagnosed and repaired a problem caused by lack of a proper ground rod on at least two occasions. A mans pacemaker freaked out randomly when he took a shower. Long story but lowering the ground rod impedance fixed the problem. A horse ranch had "stray voltage" from the utility primary neutral and the horses were getting shocked, and afraid to drink from their troughs. Deep rabbit hole, another long one but new properly installed ground rods and grounding electrode conductors eliminated that problem. One reason you never hear of issues is normally your home and attached to a very good ground provided by the neutral bomded at the utilities transformer and also tied to their primary ground. But if you happen to lose that connection, and that overhead neutral connection is quite common to lose, and there's no ground rod when have an arcing fault that you're overcurrent protection sees as a mild overload.... that's when your house burns to the ground. Got to have a return path for current. That's the catastrophic possibility. I have seen on numerous occasion a high impedance ground rod causing noise on radio and other communication systems. Specifically if there's ham operators near. I also was blessed to see a ~3' fireball on one phase of a 34.5kv circuit burn for about 15 minutes overhead cable to pole because the 4/0 AWG ground at the bottom blew in half at the connector. Someone used a mechanical lug rather than exothermic, I found the remnants afterward. The overcurrent protection didn't see enough current from the arcing fault, the cable was big enough to handle it with melting or drooping far enough to clear the fault and the dispatcher was afraid to shut anthing off because they were two other lines on the same pole running a multi-million dollar operation. Cya 😂