Because "lowest common denominator slop" is a culturally contextual judgement of media, and varies from place to place, time to time and culture to culture. Fine French Dining fans would call a pizza parlor "lowest common denominator slop", but no one would be offended if the employee handbook for a pizza place said "You're here to make the BEST TASTING PIZZA. Not the best looking pizza. Not a pizza made from the most expensive artesian ingredients. Not the fanciest pizza. Not a pizza lovingly hand crafted with dough that was hand massaged by virgins under the light of a full moon. If it's not making the BEST TASTING PIZZA, it's not your job."