the 2022 attack didn't impact the race because the drivers were assured that the refinery strike wasn't targeting them, or at least some other guarantee of their safety. MBS probably gave some personal promises to that effect too.
If the Houthis even did a symbolic encroachment on the airspace of the Jeddah rather than a refinery nearby, it would be enough to spook at least one or two drivers into refusing. The driver's union (GPDA, which isn't technically a union but works the same way in practice) should be stubborn enough to kill the whole event if a threat was timed right.
Gotta say it's a clever title. Xi is preparing for war as much as Trump if not more. But the cleverness is in the way that preparedness is made synonymous with aggression.