Napoleon’s inability to reconquer Haiti led to his decision to sell the Louisiana territory to the United States, so the US benefited. But horror stories of the whites in Haiti being massacred made the slaveholders in the US afraid that the same thing could happen to them if they didn’t maintain control over the black population. Of course few slaveholders wanted to end slavery anyway.
This is true, the leaders in Haiti knew it was a bad idea but let it happen because the people wanted blood. It doomed them. No way was any white country going to help Haiti in any way after that and it let france re-enter the picture to extract a bounty.
Without the slaughter, the US would probably not allowed France back into our sphere of influence AKA Monroe Doctrine. The only way France came back into our area was when we were distracted by the Civil War. And we ended that right after the war was over.