Also the stomach is on the other side, so if the pointy stick wouldn't puncture the liver, it would puncture the stomach.
Stomach puncture is far more survivable than a liver tear; far far more likely to survive.
The spleen is on the left though, and that is an organ that is far more vulnerable and where a rupture is lethal without surgical treatment. I still think this is bullshit, but that would be the organ to choose.
Spleen is tiny compared to liver. It's nowhere near as viable as a target. 200g vs 1.5kg.