Pharmaceuticals are only a (high) single-digit percentage of medical spending in the USA, and the (likely) reason for the ads is the highly competitive nature of the market. Most of healthcare spending is on labor, specifically doctors and nurses, who are protected by highly effective trade and lobby organizations.
My point stands... as a whole, they (medical industry as a whole, including pharma) are the single largest lobbying group and nothing you've said refutes that. My use of pharma ad spend was an example of how much money they put out as an indication of how much lobbying power all of medicine as a whole has.
