I'm far from an expert, but Vanguard is a kernel-level program. If a kernel-level program crashed, the whole system crashes. So yes, any kernel-level program could do the same thing CrowdStrike did, intentionally or not.
Kernel-level programs can do whatever the hell they want.
I would say this is an overall positive: The more people are aware of how easy it is to create fake this with AI the better, I would say. That would make people less likely to fall for it in the future, especially for something with greater consequences than just a parade that didn't exist.