Of course there is. However, I don't think medicine is separated into camps of diet vs. pharmaceutical. I think the two camps are more akin to naturalist/anti-industrial medicine, and rational treatment based on the best available means.
That is your interpretation. However, the reality is that drug companies oppose the use of nutrition to prevent disease and to manage medical conditions.
They have proven this by backing legislation to regulate nutritional supplements as drugs and lowering the dosages so much that they are therapeutically ineffective. It also would force vitamin companies to do studies so expensive that few could afford it and would drive up the costs so high that few could afford it, all while lowering those dosages of the supplement to the consumer.
Drug companies pay for scientific studies that involve dosages of vitamins that are so low as to be ineffective and then say that nutritional supplements are worthless.
For example, they will do a study with vitamin E at 10 units a day for two years. 10 units a day won't do anything. People DID take vitamin E for 2 years and nothing happened. They do the same with other nutrients like coenzyme Q10, ect.
Drug companies oppose anything that could reduce their profits and use all the influence they can to discourage people from using diet or nutritional supplements.
Half the drugs the FDA approves are later banned as unsafe, as soon as the drug company makes a new version, which is just as unsafe, but is new.
The drug companies are opposed to diet and discourage natural healing.
Those in natural healing want choice and good information out there that people can use to help themselves, which is what the drug companies are steadfastly against.
The drug companies give lots of money to the medical schools, so they influence how medicine is taught.
People in natural medicine acknowledge the usefulness of drugs where needed, while drug companies always oppose natural healing and dietary approaches in order to protect their profits.
I oppose the drug company's opposition to choice and their support of dietary ignorance.
I also oppose the recommendation of drugs when diet could be used.
I oppose the reinforcing of the idea that dietary change is unnecessary and that drugs are the only way, and are completely safe.
I oppose the idea that using drugs is the normal or the right way when diet would work.
The issue is naturalist/pro choice medicine and pro industrialist/pro profit medicine in which long term health be damned as long as drug companies can make their money, and down with anything like natural healing or diet that gets in their way.
The drug companies use the media to ridicule natural healing and diet, to make it seem laughable when they don't claim it is ineffective by conducting bogus scientific studies designed to make the supplements or the natural methods seem to fail.