Yes indeed. I have multiple references to that one instance at Fort Pitt in my thread which historians believe to be bullshit. To be clear, this is the one verified attempt we can point to since dude replaced a couple of blankets and a scarf later which came from the smallpox ward. As you said, there's no possibility he was able to spread it that way. It's just not how smallpox works. Any smallpox already in the native population was due to contracting it conventionally exacerbated by the closeness of combat in warfare.

Blankets with smallpox was never a thing that decimated swaths of natives. Smallpox was able to do that all on it's own. People weren't handing them out left and right trying to kill natives. The US government did that all on their own through widespread genocide and cultural erasure.

Blankets with smallpox, was never a thing to deserve it's cult childish joking status like everyone likes to pretend it did. People repeat it because it sounds plausible and it's essentially a historical ear worm.

Settlers weren't handing them out trying to kill people. The US government didn't have a policy to use them to trick natives. None of it was a thing.

E: Clarity.