Sorry but your concept of AI is marketing driven. It's probabilistic, understanding is past your pay grade.

They're actually right in that there are several attempts to create automated labs to speed up the physical part. But in reality there are only a handful and they are very very narrowly scoped.

But yes, potentially in some narrow domains this will be possible, but it still only automates a part of the whole process when it comes to drugs. How a drug operates on a molecular test chip is often very different than how it works in the body.