> Everyone experiences chemotherapy differently. Just as every body is different, so is the reaction to the chemicals that are killing the cancer.

Well, this is true, but generic chemotherapeutics target pretty much all cells. That's why there are so many side effects.

There are some partial work arounds, e. g. targeting some specific cells via monoclonal antibodies, but even these have side effects. I understand the rationale of stopping uncontrolled cell growth, but chemotherapeutics are hugely damaging to all cells, not just cancer cells. And it is often unclear whether these have a really profound positive impact. For instance, if you kill 80% of the cancer cells but the cost is that the other cells are significantly weakened, leading to a death due to that, then you have a trade-off that isn't so great.