Easily forgotten? It's brought up in just about every discussion on the subject, including this one, already, by the person you were replying to agree with.
Well if you want to take money from the general population and give to people whose ancestors were harmed by slavery, you need some way to differentiate between ancestors who were harmed by and ancestors who benefited from slavery.
If that isn't part of the discussion, then people are just proposing a welfare system to give money to people based on the color of their skin.