> Why does the intent of the person making the argument matter? The argument stands on its own merits or it doesn't.
That attitude might work for arguments like mathematical proofs, but we're talking about social policy here. It's too complex for that kind of certainty, so trust and good faith matter.
Also your argument was essentially like this: the Soviet Mars 2 probe failed to land on Mars. So did the Soviet Mars 2, 3, 6, and 7 probes. Therefore, NASA shouldn't try to land Viking 1
on Mars, since governments have been shown to not be able to do that kind of thing successfully.
> OK, let's run with your example....
> That's essentially what's happening. Nobody alive in the US today owns a slave, nor were they a slave. You can spend literally forever talking in circles about the effects of history on people of present day. Yes, things like slavery, Jim Crow, and redlining had bad impacts on black communities. Do we spend forever talking about it? No. And who gets to decide when the wrong has been "righted", anyway?
That is not in fact what's happening today, which is why the response consists of social policies like affirmative action instead of stuff like garnishing the wages of the descendants of slaveholders to repay the descendants of slaves. I even alluded to that.
Another way to look at it is the wrong wasn't solely committed by the individuals involved (e.g. slaveholders), but by the government and other institutions that enacted policies like slavery and Jim Crow. The government and those institutions still exist, and have the responsibility and ability to take corrective action.
Running with examples is like running with scissors; they're both bad ideas that can turn to serious errors.