No doubt the ring pack has very little "meat" above it. I still think what actually pops the metal off is theThe real issue is that the ring pack is too close to the crown of the piston
ring gaps locking up but a thicker piston wouldn't pop the top, instead it would probably tear the hell out
of the cylinder walls.
As has been stated above, there are plenty of cars with boost with non forged pistons and rods but they
have a lot more meat in the piston dome.