I agree with the sentiment but I would add that slavery isn’t even necessarily racist. Maybe it was in the USA but not in the rest of the world. Even today there are people who are slaves to others that look like them (“race” is silly when talking about humans).
The Irish slaves in NYC might argue that slavery went way beyond racism.
Is this strawman helpful? No one is claiming this will single handedly solve racism. There's effectively no downside, so any upside means it's an easy decision.
It's helpful in pointing out how silly all this obvious yet useless virtue-signalling has become, as if my teams weren't busy enough already.