>When I searched through a translation of the papyrus, however, I saw no evidence of willow bark used similarly to aspirin. I did find a treatment for an “ear-that-discharges-foul-smelling-matter” that used “berry-of-the-willow”

These two sentences critically contradict one another, unless you assume the translations to be perfect (we know for sure they are not). It appears very likely that they knew. The hypothesis that they didn't know, then, appears to be incredibly unlikely and therefore disproven without significant evidence to the contrary.

I think the article could have ended here, in the spirit of an honest science based approach to history. But it didn't.

This is a science fiction article, presented as a real ground breaking contribution to a historical subject.