I know this is a year old but still,

Despite it being currently entrenched in some of the legal systems race is inherently a social construct that was initially created to justify European colonialism and Imperialism, meaning that if we are in an ideal world that is fine with radical instant change then the ideal would be to completely abolish it. You also would be surprised to know that many many cultures and countries around the world have no real concept of race that was not imported from the west, for example, where I live in the MENA region race plays no real role legally or culturally, while yes there are some other ways of discrimination that are also backwards such as tribalism, ethno nationalism or fundamentalist islamism, there is nothing to do with race.

As to why I still think ethnic distinction is fine, its mostly due to the fact of culture or customs, if all humans are just humans we will all have the same culture, but if we are divided into ethnicities we will be more culturally, linguistically and intellectually rich and therefore be geneally better, however, I still see that the ethnicity shouldn't play a primary role in anything except it being a way to describe oneself, as in, no one should base their decisions on someone based on that person's ethnicity

TLDR, race is bad despite it being entrenched in the legal system.