This is why statistics are good. They average out those "car burnt with house" cases. Or do Tesla S and X owners have higher rate of house fires than other owners? Additionally we can look up many of these cases in the news and can check where the fire came from.
What statistics are you going to use to "average out" the cars burnt in houses? The statistics you cite have so many confounding factors it isn't funny. Are you just trolling? Or simply lacking an understanding? In case its the latter, just as a rough start, how was the sampling (from the total population of vehicles) done for that report? Some points to consider:
how many ways can vehicles be lost to fire
what are the rates for each
what is the probability for coverage
how does that probability for coverage vary (that is, what is the bias introduced)
just a rough, qualitative pass on the above suggests that there is a bias to those with economic advantage as they are more likely to have insurance coverage and that Tesla vehicles are also significantly biased in that direction. Although there is downward penetration (I have one) the ASP for a model 3 of $50k is instructive -- and the model S and X have an even greater resistance.
It quickly becomes apparent that there are too many confounding factors to make any statements that are both detailed and statistically valid.
If you really want to compare spontaneous combustion of EVs to ICEv then the problem is far more tractable, but there is a lack of information. What we do have, however, from the scant news reports is adequate evidence that ICEv actually
do spontaneously combust while parked with the engine off. Not so much for EVs. But don't take my word for it, actually do some research -- I know you can because you dredged up that non sequitor report. Okay, I'll give you a hint: google "bmw spontaneous combustion"
Nah, I can't help myself here's a link:
20 Dangerous Cars With The Highest Risk Of Spontaneous Combustion