Even if it's just one other "treatment" it's still bad. Not just because it's a waste of money, but there can be interactions. Certain foods change how drugs act, and who knows what weird remedies they would suggest that are harmful.

Then if this quack is on the team of specialists, the real doctors have to either waste time listening to garbage, or waste time trying to convince Chuckles to ignore the garbage.

Not to mention the fact that it's possible that they might not make certain suggestions when they know a scam artist is throwing doubt into the actual scientifically backed process.

When people say "why not try everything?" this is why. You can't follow a real treatment plan and psudo-nonsense at the same time.