Oh, right - I couldn't possibly have done any research or anything like that. I disagree with you, so I must be making stuff up.
Sorry, but you can't just willy-nilly disregard the origin of the term. Once people referred to "the human
race" as being distinct from animals. When early sociologists started referring to other "races" they used the term deliberately to call to mind just as great a distinction. The Mongoloids and Negroids were supposed to be something other than and inferior to Caucasoids, and "other human beings" just doesn't carry the same weight as saying that they are of a different
race - something greater than mere animals, but not like "us" at all. It was debated whether members of other races had souls (because if they did, then slavery was unjust) and notable abolitionists, especially among Catholic missionaries, argued against the use of the term "race" at all
precisely because it implied that they did not. Unfortunately, most of them were willing to extend that principle only to Mongoloids (which included native Americans), and largely agreed with the racial sociologists that Negroids were, in fact, of a different race, distinguishable from animals only by their (in the belief of that time, marginally) greater intelligence and therefore less than human. There was even a pre-Darwinian theory of evolution which posited that Negroids evolved from apes whereas Caucasoids and Mongoloids were created beings.
And it's not as if people, after learning more about human biology, suddenly realized they had been wrong and stopped using the term in its original sense. It was insinuated into the debates about slavery as recently as the American civil war. Pro-slavery people (including none other than Abraham Lincoln himself) referred to the burden of "the superior race", which was fully human, to subjugate "the inferior race", which was not fully human, for their own good. And today modern politicians use the term to refer to classes of people with inherently different abilities to care for themselves: the black "race" is a disadvantaged class, and would continue to be in their terminology a "social minority" even if there were more blacks in society than whites.
Of course if you want to, you can go on using the word "race" however you want. You can also call yourself a bag of turnips and say that 2+2=dog for all I care. You'll be wrong in all those cases, but you
can. Nobody's stopping you.