I'm not going to explain how clinical trials work and why you should trust that process. Again, bad situations do not invalidate all work being done in a field.
Compared to the "hard" sciences, medicine has not very high standards. And trials are completely profit-motivated, that's a bad incentive. These trials are conducted by the same companies who had no qualms to sell highly addictive stuff to people. Why should I trust that the data they publish is the data they collected?
If somebody said I've discovered time travel and the onus is on you to prove me wrong you'd call them out.
Explain the science or gtfo