"Human rights" would be an issue for the US if the US thought it could invade Saudi Arabia and steal its oil.
There isn't a compelling reason yet to invade, they're still willing to sell to us and they aren't mining water preventing us from receiving oil from other people.
Leadership dieing (Steve Jobs / OBL) and an organization (Apple / Taliban) no longer existing aren't always the same thing.
MBS is well aware of USA using either a coordinated attack (OBL raid) or a targeted strike (cruise missile) to kill high level targets. Perhaps Saudia Arabia will continue to exist as a country after a war with the US; but he won't and the US will be getting the oil.