Though one thing that I might think researchers might not want is people may be too sick to recover even if their cancer disappeared tomorrow.
There must be informed consent, no reasonable alternatives (which, in cases we deem terminal, is often the case), and some evidence pointing to the treatment possibly being helpful. It's an excellent ethical program that gives patients a choice and advances science.
The biggest exception is oncology. Since everyone knows that chemotherapy is hell, cancer drugs tend to get a pass and pre-approval companies are (slightly) more willing to work with compassionate use exemptions.
Here's an insightful blog series about Jake Seliger's experience participating in clinical trials. He was a regular HackerNews user who passed away in 2024: https://bessstillman.substack.com/p/please-be-dying-but-not-...
[1] https://www.science.org/content/article/joining-cancer-trial...
Even if you're buying time with every trial, all you've done is turn the patient into a lab rat for physicians to play around with. The ideal patient needs to be dead enough to have no human rights, but alive enough to participate in the trial. The hope of a miracle cure means the patient doesn't believe himself to be dead enough to not have human rights anymore. It's a paradox.
Signing the documents for such a trial is equivalent to signing your consent for euthanasia. It shifts the blame of death from the cancer to the company performing the trial. It's an extended form of organ donations where you donate your entire body while you're still alive.
Trials are also by no means exclusively performed on terminal patients.
When she was diagnosed with leukemia she was able to get into a research study herself that gave us 10 more years together.
One of the horrible but necessary parts of trials is the control group, who receives placebo. This is only done in a few of the trial phases but is essential in measuring efficacy. If someone wants to throw their brainpower and a little bit of AI/tech at the problem, you could end up eliminating a lot of suffering.
This is done for targeted advertising all the time. Frustratingly, the surveillance capitalism industry is precisely the reason the dataset you'd need probably shouldn't exist.
Maybe we'll get some decent lawmakers sometime soon, and problems like that will be fixed via legislation. They'd need to ban the root-cause of the problem. I'm guessing it's more likely the current congress will let private companies steal + sell everyone's info instead.