You're correct. But it never says what the base likelihood of a severe even is.
30% higher than a base of 0.01%? 30% higher than a base of 10% probability?
That makes a difference.
Especially if other factors have much higher contributory rates. Like "letting underbrush accumulate increases chances of severe events by 400% YoY".
And it's not a postmortem if you only discuss a single factor. It's an opinion/position piece.