You see this in organ donation. Opt-in is abysmal, but it's the reverse when they switch to opt-out. I get the utilitarian reason for the change but it's ethically and morally dubious.
Informed consent is the gold standard, except when it's not.
Informed consent is the gold standard, except when it's not.
You're thinking of medical research and experimentation.
In the practice of medicine the Hippocratic oath takes precedence over everything else so of course informed consent gets thrown out when there is concrete evidence that it interferes with medicine's purpose: healing people.
When's the last time someone gave informed consent while unconscious and bleeding out after a car crash or shooting? That's why we have DNRs.