You don't have to agree that they have ownership. There are some people who disagree. It's an emergent phenomenon. There is no committee that decides this. But you would be fighting a difficult uphill battle, one that doesn't seem to have much upside (from my perspective).

The word's complex meaning is found in its enormously rich historical and cultural contexts.

This is a very common, slightly less obvious variant of 'how come there is no white history month'. You can google your way to plenty of discussions of it, including a recently very popular Ta-Nehisi Coates video.