The hard part isn’t killing the cancer cells. It’s not killing the rest of you while you do it ;)
I had infected Polyps in my colon. It was no joke. It hurt really badly having a BM, and I had surgery to cut the Polyps off to avoid Colon Cancer. Cancer is no laughing matter. I'd rather not have cancer than have it and try drugs on it to see which one kills it.
As stupid as the headline sounds -which I concur, sounds rather silly-, it does not mean that.
The article is about organoids [0]. What the quote means is that if a patient had colon cancer, they could extract some tissue from it, grow it -in a dish, in a lab- into an organoid, and then try various options on it to see exactly what works on this specific patient.