I agree, the anecdotal evidence is highly suspicious that gallbladder surgery is a cause of GP in many people. The disconnect that I see is the belief that vagus nerve damage is the only cause of GP. My research and others here shows it is not, it is but one of many possible causes. Perhaps some damage to the enteric nervous system, which is embedded in the lining of the gastrointestinal system, happens during some surgeries. “The enteric nervous system (ENS) or Intrinsic nervous system is a subdivision of the autonomic nervous system (ANS) that directly controls the gastrointestinal system in vertebrates.” “Vertebrate studies show that when the vagus nerve is severed, the enteric nervous system continues to function.” Wikipedia.