Use of AI (actually Machine Learning) in the medical field has been going on for a LONG time, and has nothing to do with the recent explosion of mostly-useless LLMs. And even if this weren't the case, the way some technology was developed kinda doesn't matter a whole lot when it's going to be put through a rigorous testing process to determine it's actual efficacy. Which is what this article is talking about: taking a drug that's already gone through a bunch of non-human testing and moving to the next step.
I know the US government is doing its damndest to dismantle safety regulations, avross all industries, but I don't think we're quite at the point that we should be alarmed at new possible cancer treatments.