Medical science might challenge you here – we use biological race as an indicator to determine risk factors for many diseases. Here’s a source from the national institute of health that might be of help – https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3737365/

You may be approaching the issue from a postmodern perspective, and if so, I cover that in my article on the “social construction of race” – see here: https://helpfulprofessor.com/social-construction-of-race/

While there are socially-constructed beliefs wrapped around the term “race”, there are, of course, biological facts of race. If you deny this, you might want to ask Rachel Dolezal how that turned out when she – a white woman – tried to claim she was Black.