Spitballing here. I always understood stuff like this as "the system doesn't care about you, it cares about the masses." If the result is overwhelmingly looking no better than a placebo, then the small number of people it actually helps is sort of irrelevant. The exception might be cases where people are willing to drop a bomb of cash for lifesaving drugs for rare diseases (Pharma Bro got a lot of flack for massively jacking up the price of one of these drugs.) I don't know what implications such a study may have in a complex space. I imagine the drug will still be available for those who want to try, but far less prescribed as a sort of safe default. I doubt drug companies will care much for this, since the patent has long expired.