You and Dave apparently skipped this:
Both might ensure a steady stream of profit for a relatively decent amount of time. But that won't maximize profits, nor will it promote quality.
No, you just seemed to have skipped this:
You obviously have never heard of the auteur of mediocrity, Michael Bay.
Bay constantly shits out mediocrity in celluloid form and continues to rake in billions of dollars for it. His Transformers movies alone have raked in over a billion dollars. That's more money than the Transformers franchise made in TV and comic book deals in the twenty years before he date raped the concept. That's only box office take. It doesn't include the toys and other merchandising that went through the roof.
As far as your quality argument goes, you're grasping at straws there. Mediocrity by its definition doesn't promote quality. You're just throwing words out there to try and bolster your argument. If something sells and sells well, companies don't give a shit about quality. They care about the money. You have as of yet prove that mediocrity doesn't make companies a shitload of money over the long run (hello, Geoff Johns) compared to quality books that few people buy and get cancelled quickly.