Oh, if by 'just-world' fallacy, you mean that medical science ought to be about understanding things and making things better,

Medical science is about understanding things and making things better but it's not about understanding everything. Different organisations focus on trying to understand different things and focusing on whether different interventions work.

I want to be defeated.

In a world of very uncertain knowledge that's not to be expected.

But if that's actually what you want you have to move to make more specific claims. You still haven't provided probability values for any of the claims you are making. As a result it's hard to argue that you are wrong about the probability of various claims.