You're absolutely right, of course. But they do serve a purpose. After all, who would want to spend their leisure time reading only Shakespeare or Dickins. Life is about variety so there is a need for Harold Robbins and Jeffrey Archer too (well, Harold Robbins, anyway!).
So yes - most soaps are populist, pulp fiction but on the whole, they're pretty harmless and pass the odd half an hour here and there. (Unless you watch all of them in which case they pass the odd two or three hours every night!)