That's really the case for medication, as well. I wish doctors would be better in this regard and pay more attention to individual needs. I understand that would be more difficult and would likely increase costs, but still.
The way it's done now is as you said, "take x mg at y interval" based on the tests done during drug development. If you don't respond to the medication the same way as the majority, you're in for a ride. If x drug doesn't work, try something else until something works. It's a pretty terrible approach, tbh.
It's rare to find a doctor who will keep in mind the many individual factors, often they have a lot of experience (to build that database of knowledge, which sadly is not shared) and actual interest in their work, a surprisingly rare thing.
Nearly 500 years ago, Swiss physician and chemist Paracelsus expressed the basic principle of toxicology: “All things are poison and nothing is without poison; only the dose makes a thing not a poison.”
The way it's done now is as you said, "take x mg at y interval" based on the tests done during drug development. If you don't respond to the medication the same way as the majority, you're in for a ride. If x drug doesn't work, try something else until something works. It's a pretty terrible approach, tbh.
It's rare to find a doctor who will keep in mind the many individual factors, often they have a lot of experience (to build that database of knowledge, which sadly is not shared) and actual interest in their work, a surprisingly rare thing.