I don't think anybody truly believes that taking images of black holes is a one-person job. And the title doesn't imply that. Neither does the next, boldface paragraph in the article:
> A 29-year-old computer scientist has earned plaudits worldwide for helping develop the algorithm that created the first-ever image of a black hole.
Immediately followed by:
> Katie Bouman led development of a computer program that made the breakthrough image possible.