What the F@#& was chevy thinking?

I used to work for Caddy back when the Northstars were just out, from 2000 to 2004. I painfully remember doing ALOT of Helicoils for a major pulled thread issue that GM was well aware of... Head gaskets and bottom end oil seals puking oil like the Valdez!. Nothing like splitting a motor apart on nearly new car Great time for flat rate but sucked for the consumer out of warranty.