Seems like a simple, cheap solution compared to shopping around for a quieter computer or parts. How is it so problematic to have cables running along the mold

Seems like a simple, cheap solution compared to shopping around for a quieter computer or parts. How is it so problematic to have cables running along the molding and around a corner? In fact, why bother worrying about the noise anyway? Some people function much better with white noise in the background.