That's only true if you can use the same aspirin as many other people. If the specific substance needs to be adjusted to your specific tumor, it may remain extremely expensive for a long time - until it becomes a technician's job to find your specific cancer signature and synthesize the drug from it.
Yes, this is what I meant by it being the technician's job. But building out a new commodity specialist job out of this new technology takes a lot more time than it takes to ramp up production of a regular drug.
e.g. if you want to pay a chemist to synthesise Aspirin in a lab for you it will be very expensive. But it costs pennies in the store.