Viral marketing does not necessarily mean that a hospital is a bad hospital. I'm actually getting surgery next month from a doctor who works at a place that's going viral.
However, I hope that you accept the information while keeping in mind the possibility that the information you obtain from the app may have been intentional.
Sometimes, people ask me if it's okay to make a list of hospitals that are mainly mentioned in the app, and I have a lot to say, but I won't. Do your best to research around Seongyesa, Google, Naver, Side Effects Cafe, etc. before making a decision.