ball joint issues

Ok, so it is the bolts that hold the ball joint to the control arm, same thing, there are thousands of cars on the road and they are all bad? Aren't those two bolts like 1/2" or something? Come on, this means all a-bodies are going to or could fail because they used the same lower ball joint until they quit making the a-body. It's the upper one thats different on the later a-bodies. Or am I just not understanding it correctly?


Chuck