Sure it is. Gilead made 100 billion dollars curring Hep-C with seed research investments that were probably much less than 1 billion. So as long as this strong differential and potential for profit exists, drug companies feel competitive pressure to produce better treatments, irrespective of the fact that "milking" the pathology would yield them trillions collectively. It's effectively a "tragedy of the commons" of s…
It would still require that the company that develops the cure could make more profit off it than it would make with chronic treatments. So if you went purely for profit, you could only develop a cure if: - you could price it higher than the price of the chronic therapy over the full lifetime of a patient. or - you could sell it to more patients than you could have sold the chronic treatment. A lot more, because ever…
No it doesn't. Why? Because there are multiple companies.
If company X is making $10B per year on a poor treatment, there is still an incentive for another company to create a cure, even if it only makes them $1B.