Yeah, but that's racist!
That's oversimplifying what I said and what (sensible) people have written on the topic. Though considering the general craziness, I wouldn't be surprised if someone actually made the remark. Anyway, such a statement is neither racist nor problematic. It only become problematic when being good dancers or basketball players or in other words, being physically strong entertainers, is perceived as all that black people can be -- which is often the case. It could be argued that there aren't that many black intellectuals, writers or scientists, hence why the belief is perpetuated. This being said, anyone who's interested would quickly find out that they exist and have always existed. Additionally, besides reinforcing long-enduring stereotypes, it would prove the point that black people are seen as a monolith rather than individuals.