Yeah, not thinking that an engine not designed for FI that throws a rocker out of the head MAY be related to the supercharger is pretty dumb. When you blow an engine you are increasing the pressure inside the cylinders, this increases how hard it is to push those valves which is done indirectly by.... the rockers. Maybe that's a weak point, but I can guarantee that they don't normally go on a NA engine at 30k miles.
You supercharged your car that was designed for NA. The engine expired at 30k miles. Not coincidence IMHO. I agree with @
Pat 100%.