Computers in the movies are much more noisy and visually exciting than in real life. The truth is that computer crime is visually very boring to watch. The criminal just sits there switching between prompts and editors typing in cryptic commands and getting getting very terse output as feedback. All that’s heard is the tick of keyboard, the rattle of disks and maybe the whir of cooling fans, assuming they haven’t taken steps to quieten their machines. Maybe they’ve got some music in background. Movie directors usually can’t abide silence or visually dead scenes. This is why we have space vehicles in science fiction epics that bank like airplanes and make noises like insects with Tourette’s Syndrome. The same applies to computers.
Reality apparently doesn’t make for good cinema.