What do hunger strikes accomplish?

My wife and I were recently discussing this story:
https://www.npr.org/transcripts/928341366
What ultimately is the point of a hunger strike? If a person starves himself, how does that incentivize some other group (captors, university, government, sports team, etc...) to change its behavior? My contention in our conversation was that the only use for a hunger strike is as part of a strategy to bring public attention to a particular situation. The hunger strike doesn't accomplish anything in and of itself but is used to make the messaging about a given situation or behavior a bit more dramatic and sensational. The corollary is then that a hunger strike would not happen without an ongoing ability to communicate about its existence to the rest of the community/nation/world.
Am I missing anything?
https://www.npr.org/transcripts/928341366
What ultimately is the point of a hunger strike? If a person starves himself, how does that incentivize some other group (captors, university, government, sports team, etc...) to change its behavior? My contention in our conversation was that the only use for a hunger strike is as part of a strategy to bring public attention to a particular situation. The hunger strike doesn't accomplish anything in and of itself but is used to make the messaging about a given situation or behavior a bit more dramatic and sensational. The corollary is then that a hunger strike would not happen without an ongoing ability to communicate about its existence to the rest of the community/nation/world.
Am I missing anything?