Maybe someone here who works for a living doing pharma research might chime in but to me "AI curing cancer" makes about as much sense as "datacenters in space".
The biggest barrier for pharma research AFAIK doesn't have anything to do with finding candidate targets and corresponding drugs, there's thousands and thousands of those and progress for finding candidates as it stands is quite good, but all that pales in comparison to the time and cost of developing the actual candidates, then engaging in medical trials at all levels and waiting for results and then developing the engineering for manufacturing at scale and at cost, as usually all modern monoclonal antibody therapies run in the tens of thousands of dollars. How is AI supposed to help at accelerating Phase 3 trials? How is it supposed to help us find better bioreactors?
If we knew the answers to those questions, we would have a cure for cancer.