I often struggle with whether someone is just really dumb or trolling. I think you fall into the former camp so I'll try and help you out.
>>96912343
>Why do you think they dump dirt on forest fires from helicopters and not water?
They do use water. To the point that the most states I'm aware of that heavily deal with wildfires have laws that allow these copters to take water from outside pools in the case of emergency and water shortages.
>That's why fire extinguishers aren't just canisters of water.
There are water canisters but you wouldn't want to use them when chemical fires or when electricity is present (at least in close proximity, see pic related). That's why there are multiple types of extinguishers available, because there are different types of fires and different substances best suited and safely used to put them out.
>Water just makes the fire spread in your kitchen
That's a grease fire.