My core point is that if your "fire prevention" plan is to drive the number of ignition points to zero, you don't have a fire prevention plan, because even the impossible isn't going to be enough. It's not a sensible answer, and it's not really sensible to blame the fires on the individual ignition events.
Or, to put it another way, when we set off an explosive, the explosion isn't really "caused" by the electrical spark; the unusual thing that happened that primarily caused the detonation is the collection of a lot of explosives in one place. Explosives experts are careful around any concentration of explosives, because that's the real cause. By contrast you can play with the electrical detonation system in isolation all day long and at most you'll shock yourself a bit, and that only with extreme carelessness. The primary cause of these fires is the accumulation of huge amounts of easily-burnable material, not which of the thousands+ of ignition events was the unlucky one to set it off.
Or, to put it another way, when we set off an explosive, the explosion isn't really "caused" by the electrical spark; the unusual thing that happened that primarily caused the detonation is the collection of a lot of explosives in one place. Explosives experts are careful around any concentration of explosives, because that's the real cause. By contrast you can play with the electrical detonation system in isolation all day long and at most you'll shock yourself a bit, and that only with extreme carelessness. The primary cause of these fires is the accumulation of huge amounts of easily-burnable material, not which of the thousands+ of ignition events was the unlucky one to set it off.