You appear to be arguing for a legal process that only recognises actus rea and denies any role for mens rea (yes motive isn’t precisely mens rea but ‘motive’ is how the defence frequently approaches the issue of mens rea).
Not being able to show ‘why’ in science raises the bar for how much more relevant is the ‘how’.
On what basis is probability of safety in M.E/CFS to be derived from safety in Cancer ? Which cancer ?, which demographic ?
And safety isn’t the only issue – risk/benefit judgements require some appreciation of the probability of potential outcomes. For example a mild improvement in 1 in a 100 patients, matched against possible permanent impairment would probably put most patients off a particular intervention. The Mella and Fluge study, just isn’t adequate to guide patients in terms of risk/benefit.
Yes ‘open label’ studies of Rituximab in different auto-immune disorders present some interesting data http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3002645/ but participant numbers are low and levels of impairment are often profound.
And the risks are ? All that can be talked about are ‘known’ risks, and as none of the prescribing doctors have published a protocol it’s impossible to know what discussion of known risks is taking place. More concerning still are the levels of monitoring and co-operation with primary care providers, given how poor the PC support for M.E/CFS patients is, and at least in the case of Kogelnik patients are travelling significant distances monitoring during treatment seems likely to be problematic.
I think it's improper of you to presume doctor misconduct in absence of any evidence, especially while naming a specific doctor. There is no indication that Dr Kogelnik or others are not keeping close tabs on their patients. I take a medication prescribed (so far) from a considerable distance, and my GP does not feel qualified to handle it, but it is very easy for me to email or Skype the prescribing doctor to discuss things. If side-effects do arise requiring emergency treatment, it is highly likely that the local hospital would be able to provide appropriate treatment for those side-effects.