Drama drives intensity. When a story or an image is filled with strong feelings, it can similarly invoke strong feelings in the audience.

It's hard to imagine stronger feelings than those felt when a person is chopped in half, or has pieces exploded. Imagine it. It's nightmarish. These are among the worst things that could ever happen in real life, and so they are the best things to happen in art, the most intense, the best drivers of feeling in the audience.

All the good reasons why we wish these things would never happen in real life are exactly the reasons why they make good art. By comparison, ordinary art is often tedious.