One could argue that BP was a bigger achievement for the art than Vice, though.
Think: in 10 years, which of these two movies will people remember, refer to, and rewatch the most? Probably Black Panther, because it resonated so intensely with such a huge amount of people and was decently enjoyed by everyone else. Vice wasn't even loved that much by its biggest fans.
This isn't a perfect analogy, but: If Star Wars had been nominated for best picture over Bound for Glory in 1977, people like us probably would've thrown a fit. Nowadays, I think most people would feel that Star Wars would've been a worthy contender for that nomination.
I think our opinion of what makes a movie Oscar-worthy is way too limited and results in a lot of forgettable movies getting nominations.