I'm sorry to hear that your mother did not get access to a treatment that she wanted to receive. Clinical trials cherry pick the patients that they think will d

I'm sorry to hear that your mother did not get access to a treatment that she wanted to receive. Clinical trials cherry pick the patients that they think will do the best. This is a dubious practice at best, but it is what they do, and they do it because as you point out, most new treatments have only an incremental benefit that is easily obscured.