> So maybe Zuck is telling the truth here, that they are trying to fix all this. But no one can see the forrest from the trees.

Don't fall for words!

Frances Haugen was able to see the big picture. The documents she presented had Facebook employees mentioning it. Facebook didn't act on what was known. It is not that it wasn't known.

To paraphrase John Roberts - the only way not to do a thing is not to do that thing.