The following example (not of philosophical interest) illustrates Wittgenstein’s idea: people say that cell-phones are harmful because they emit heat which increases the temperature of the brain. That one is mislead by this picture is shown in the act of showering one’s body under heated water: the water pours over my head, increasing the temparture of the contents inside my skull. Is this harmful to humans? Should people opt instead for cold showers? Clearly, not.
So, what is the picture that held us captive? It is the picture of cooking flesh. An effect of it is fear and disquiet, which doubtless hastens the unconscious application, and our lack of acknowledgement thereof.