I think the idea would have been that Pfizer and Moderna could have pooled resources and made a single optimal vaccine faster, though I'll admit I'm not sure it could have happened any faster than it did from my perspective.
The Kefauver Harris Amendment you refer to was immensely important towards the development of safe and efficacious drugs -- I do not see the connection between that act and rare disease therapeutic development. In fact, drugs that only offer marginal improvements in quality of life for rare genetic disease patients are often fast-tracked by the FDA. Requiring that a drug _works_ shouldn't inhibit drug development. Otherwise, we end up with tragedies like what happened with the use of thalidomide, which prompted this amendment in the first place.
The Kefauver Harris Amendment you refer to was immensely important towards the development of safe and efficacious drugs -- I do not see the connection between that act and rare disease therapeutic development. In fact, drugs that only offer marginal improvements in quality of life for rare genetic disease patients are often fast-tracked by the FDA. Requiring that a drug _works_ shouldn't inhibit drug development. Otherwise, we end up with tragedies like what happened with the use of thalidomide, which prompted this amendment in the first place.