alt Hacker NewsIf a lot of people take the mediation and die is that evidence that the medication is unsafe? If they live is that evidence that the medication is safe? Either both are true or neither is true. The relative weight of evidence is dependent on priors but it is still evidence.
Your comment reads like someone with no experience in medical trials - neither pharmaceutical nor medical devices. Death is not the only negative outcome. Nor is a procedure that is commonly followed by death necessarily a bad procedure - many cancer treatments for example fall into this category.