As a celebrity, Boseman likely gained a lot from not being open about his diagnosis, in terms of maintaining the image he wanted to in public life and avoiding all the media scrutiny and questions, but like everything, life is complicated, and there is some loss there as well.
In the case of Chadwick Boseman, things are more complicated.
By all accounts Da 5 Bloods actor was intensely private about his personal life, to the point where most of the people who knew him did not know he was battling colon cancer, from his Avengers to 5 Bloods collaborators.