If the doctors get desperate will they start using inexpensive and nontoxic treatments like IP6, curcumin, and vitamin C?
No, they would rather let their patients die than do that. And in some states they might even be prosecuted and lose their licenses for saving lives that way.
Here’s an explanation for the shortage of drugs https://slate.com/technology/2023/07/cancer-drug-shortage-supply-chain.html