For me its not a solved problem and AI/ML would still help to solve plenty Drugdiscovery in itself is such a broad area
There are still normal labs out there doing research for years on one drug alone
And biology of humans is huge and complex, not only is it not solved, its also expensive.
Even if you just not do ML drug discovery, AI can hellp with making the research faster: writing grants, finding issues, creating plans/ideas/suggestions, hepling with finding the newest research, writing code for supporting or analysis, controling microscopes and machines.