Is debating racism with other races a waste of time?

Years ago, I used to debate hot-button topics like white privilege, slavery’s modern day impacts and police brutality with [right-leaning] white people. After spending hours of debating and reinforcing my talking points with valid sources; we were NEVER able to agree on anything. 

At the end of the day, we just see the world extremely differently so why should either of us spend any time discussing this?

I used to think that talking these kinds of dialogues were something extremely helpful to gain a common understanding but it’s just a waste of time. In debates, very few ppl care about learning new things; they just don’t want to feel stupid if they’re proven wrong..that’s it. Nobody cares about facts or the obvious reality staring them in the face..