On a related point that I've brought up before: what Diwan can or can't produce in his Theracour lab is s big red herring. These rumors by "inside sources" are a part of it.
It's a distraction from the question: why didn't NNVC pay a professional contract CMC chemistry lab, that typically has a few centuries of specialized process design and scale-up chemistry experience distributed among its staff, to design and scale up the process for them?
It's completely predictable that Diwan, who has zero experience in such matters, wouldn't be able to lead a team over 14 years to accomplish what a competent group of chemists who specialize in solving these exact problems could do in few weeks.
The answer, in my opinion, is this has always been strong evidence that Diwan's only interest was having an excuse for NNVC to pay Theracour as much of that $92M as possible in salaries and R&D costs.