Anything can happen, but you're predicting the future without any evidence. You just made up a scenario in your head, predicted it would come true, then you can't believe people would say it's ridiculous.
When was the last time this happened with a gas car? How often are fires happening with lithium iron phosphate?
You think a car is going to crashing into a building AND burst into flames AND be impossible to put out AND burn the building down?
When was the last time this happened? Let's think about odds and statistics super hard.
>When was the last time this happened with a gas car?
ICE car fires are easier to put out.
>You think a car is going to crashing into a building AND burst into flames AND be impossible to put out AND burn the building down?
EVs catching on fire and then being impossible to put out is something that has already happened, and in fact as I understand it the latter invariably follows from the former. The only new thing that needs to happen is the fire happening while the car is not out on a road, but inside a building where it can set other things on fire. The fact that the vehicle cannot be put out and can frustrate firefighting and rescue efforts makes an already dangerous situation even more dangerous.
Which part of any of this is straining your imagination?
I'm not really sure what you think the difficulty is. A firefighter in fire protection gear hooks the burning car with a large metal chain, the other end goes to the fire truck, tow truck or winch, the car comes out of the building.
The building is made of ordinary building stuff like wood and plastic which can be extinguished using ordinary means, you just need to remove the car so it doesn't set it on fire again. The same means (dousing it with a fire hose) can temporarily lower the temperature of the car. Firefighters already have the equipment necessary to deal with toxic smoke.