Why not? It's an interesting point that he was a Boy Scout, an organization whose statement is "to prepare young people to make ethical and moral choices over their lifetimes", and he went on to be a terrible human being.
Because news stories and editorials are separate sections of news media.
Including that bit of information is not relevant to the facts. You can take any news story and cherry-pick unrelated details to paint things in a certain light.
This is a contrived example, but lets say there's a news report about MIT investing in some new technology and a journalist doesn't like MIT. The headline could read "MIT invests in questionable technology" and begin with "MIT, which has come under fire for having received $750,000 from Epstein is investing $750,000 in foobars".