OK, so you are optimistic. My own specialization is encryption/security, so I am not. State actors can do such things, too, and we've already had a small wave of classical physical-world sabotages in Europe that everyone suspects Russia of.

"further doubt that it would cause anywhere near 10k deaths"

This is something I can agree upon, but you have to take into account that human societies don't work on a purely arithmetic/statistical basis. Mass casualty events have their own political and cultural gravitas, doubly so if they were intentional.

Sinking of the Titanic shocked the whole world and it is still a frequent subject for artists 100 years later, even though 1500 deaths aren't objectively that many. I don't doubt that way more than 1500 people drowned in individual accidents worldwide in April 1912 alone, but the general public didn't care about those deaths.

And a terrorist attack with merely 3000 dead put the US on a war footing for more than a decade and made it spend a trillion dollars on military campaigns, even though drunk American drivers manage the same carnage in five months or so.

It's like jets falling out of the sky because the guy that bolts the wings on is only half doing his job, we can all see it and know about it and yet.. nobody wants to speak up.