You are citing research that apparently is stating the obvious, namely that good students are faster at completing homework than poor students. Not sure how that supports the statement that homework is harmful for either group.
Skimming the lit review you linked, homework appears to have a moderate positive effect on the immediate measures of achievement, e.g. grades. Though the effects of lifelong habit of completing one's homework are more interesting than short term grade improvements, and a quick skim of the 60 page lit review you quoted doesn't seem to attempt to quantify this effect.
Food for thought: attempts to scientize every aspect of life, even if the measures used are obviously limited and shortsighted, is perhaps not a good way to steer an entire society forward.
AS SAID: I deliberately sent you the most pro-homework review. Despite being confounded in almost all of the component studies (being based on reported homework completion times rather than amount of homework assigned), no real benefit was shown in elementary.