It seems as though you're invoking a slippery slope fallacy; it's possible to say exactly the same about doctors working for the state who minify or trivilazize the examination of physical harm on dissidents too. The fact that expert testimony can be bought off or compelled does not preclude expert testimony from being an important consideration in general. The opioid crisis for instance has shown there are many incompetent doctors, but I doubt you'd refuse the testimony of a doctor to help your case when you are injured by someone else.