Earlier quoted context omitted.
Stop with the strawman. A dryer, hotter climate will cause fires to get larger and do more damage. No one says that a hotter climate will cause the initial burn spontaneously.
Given the initial spark is usually lightning, which will have a higher chance of causing an out of control fire in dried out conditions, and which is certainly "spontaneous" in my view (as in, nothing we can do about it apart from monitoring), why not? I'd say it qualifies.
Dried out conditions make initial triggers (like lightning or arson) more likely to have disastrous consequences.