Why are there scenes of laser pen fights in science fiction films such as Star Wars?

Because the laser pointer is the most advanced weapon you can think of in human science and technology, or the weapon that can be displayed on the screen, just like other more advanced weapons, it is not so effective. The laser sword with luminous stick can have a very good screen effect and looks very tall. If you switch to other weapons, such as some anti-gravity equipment, these things will not have such a good screen effect.