I often hear arguments that go like this but I don't know how to respond to them

I often hear arguments that go like this but I don't know how to respond to them

I often hear arguments that go like this but I don't know how to respond to them. "Not everyone who is bullied develops behavioral problems or not everyone who is sexually abused develops a severe mental illness such as schizophrenia." These kinds of arguments often imply that because something doesn't happen to everyone then there is no causal relationship between a stimulus and an event. But that seems wrongheaded because though not every ball falls into a pocket after a break in a game of pool that doesn't mean that the cue ball/stick along with the person making the break didn't cause those balls to fall in the pockets. You could also use the same form of argument to argue against more popular beliefs such as the idea that soldiers experience PTSD because of their wartime experiences. So what exactly is wrong with those kinds of arguments assuming I am right in believing they are wrongheaded?

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