I'm on Twitter/X with some of the most vocal proponents of eliminating racism in D&D, and on Reddit with the same, and I've never once seen a single person advocate for the kinds of changes you're claiming "must" be undertaken for this issue. Not. One.
I have definitely however, in this very thread and elsewhere on this very message board, seen legitimate claims from people who identify themselves as being from two different races, that they would be offended and saddened and consider it racist if D&D eliminated the concept of half-elves and half-orcs, and who further find they identify with those races in a positive way.
Given that your view appears to be considered racist by some people of color here, and does not seem to have support of people of color (unless I have not seen it, which is possible), why have you not considered the possibility your view of this might be flawed?