She is however the target of pretty much every financial scam on the planet, many of which rely on convincing folks to hand over the keys to their (digital) castle...

Which financial scams involve such attacks, so is there a single scam that this measure would prevent?

I'm not aware of any that this particular sensor would mitigate. I think the idea that security is only for people targeted by nation-states is not a realistic view of the modern world (and, moreover, if we decide that normal people don't need enhanced security measures, it becomes trivial to identify dissidents by the fact that they implement security measures).

State hacking tech leaks to average hackers and scammers over time. Scammers today are using nation state tech from a decade ago.