Earlier quoted context omitted.
The fact that companies often spend more on marketing than R&D is irrelevant. The fact is that they spend billions on R&D. They have to recoup that. Presumably they don't spend money on marketing for shits and giggles--they spend how much they need to maximize revenue.
Ask yourself, why is the United States the only country in the world where advertising prescription medicine to consumers is allowed? Why is it even needed? I know some people say "education", but that's backward. You have a problem. You go to your physician. He works out a treatment plan for you. For drugs advertised for specific conditions? To enlighten you to alternatives? You can oftentimes assume that alternativ…
Because, contrary to popular belief, doctors aren't gods, and have about the same fraction of slackers as any other occupation. Unless we're ready to have a really aggressive program for revoking licenses of doctors who don't keep up with modern advances, they can and do miss available treatments.
"Hm, I could eagerly search all the latest treatments that might be relevant to my patents, or I could write them up something based on gut feel and what I learned in med school 30 years ago. Both pay the same."