This is contradicted by the definitions of "race" given in the Wikipedia article. I am not a biologist so I am more persuaded by the Wikipedia article than your opinions which based on you (admitted) ignorance.
As you appear to have problems reading and/or understanding, here it is again more loudly:
in 1972, Harvard geneticist Richard Lewontin showed that the concept of race starts to dissolve under genetic scrutiny. He found that the vast majority of human genetic variation, which he measured in 16 genes, is found within, not between, what he called the 'classical racial groupings'6. Since then, studies examining hundreds or even thousands of genetic markers have confirmed Lewontin's findings7, 8.
I don't think saying "this old way of viewing the world appears to be objectively meaningless" is political correctness. But what does it say about someone who wants to hang on to those old definitions because it suits their worldview?
Because that is not what it means. Those results are based on the genetics of populations now, not ancestry or race. There have been many examples of mass migration in human history, from ancient times to the last few decades. That is, to a large extent, what is represented by those results.