Most of the arguments on Covid-19 are moot. You need to consider that the human body is not like a computer where fixing a problem can be replicated on all other computers with predictable results. (Yes, I have an engineering background.)
The human body is not just an organism defined/grown from a preset DNA template. We are the sum of that along with every virus currently in our system, the bacteria in our gut/body, the history of what we eat, the environment, the list just goes on.
So, the expectation that anyone can definitively say that a protocol works for everyone is simply not realistic. And saying that a protocol causes harm is also not possible since it is impossible to account for all the other factors involved.