My response to this post here.
From my experience, African diasporic dances created outside the USA are treated better than African diasporic dances birthed in the USA. As an example, at the ballroom studio, where I started dancing swing, they taught us that merengue came from the Dominican Republic. Swing (i.e. labeled "jitterbug" at the time), no history.
There's another studio here where the African diasporic dances birthed outside the USA are labeled by their given names. For their special Lindy Hop class with a Lindy Hop instructor, it was promoted as Jitterbug.
At one of Denver's establishments, Lindy Hop is known as America's dance born in Harlem named after Charles Lindbergh's legacy flight. It's encoded as Black (born in Harlem) though not explicitly said where it's owned by America (distinctly white) named after a white American. For years, it was also shared to thousands of people that Lindy Hop died and was saved by white people. It took a Black queer person two summers ago to demand that the white instructors say Lindy Hop is Black so the instructors started giving proper attribution in class. That Black person is gone so who knows what's been happening?
So when white-led swing dance groups will avoid saying this dance is called Lindy Hop and rose within the Black Harlem community where it's been long-practiced tradition, I understand your friend's point. There's cultural theft at every stage where you, the participant, are supposed to somehow understand that Blackness is implied.