vehicles combined worldwide, and there hasn't been a rash of similar incidents that lead to fires, I think it's safe to assume that this was an isolated problem where the debris was the right size and shape and struck the Model 3 in just the right place to penetrate the battery pack.
That doesn't happen with conventionally-fueled internal combustion vehicles. When the fire departments put them out, they stay out. But with EVs, depending on the battery chemistry, the vehicles can enter a state called thermal runaway. The fact that the cells in this specific Model 3 were likely NCA cells and not LFP likely played a role in why the fire department had so much trouble putting the fire out. LFP batteries have a much higher ignition point so they are less likely to enter thermal runaway.Electric vehicles are statistically less likely to catch fire