That annoys people because Pfizer is going to advocate for things some people might not like. But that's the cost of a rule that makes it so the NY Times can advocate for things other people might not like.
The idea that people can come together to form cooperative groups and can use those to exercise rights through the idea of personhood is such a normal and legally settled idea.
“Corporate personhood” is irrelevant, in this comment chain, and is just a way to take a swipe at an ostensibly left-leaning org in order to turn this into a team sport.