Oh yeah, I didn’t mean to imply they were withdrawing all their current treatments. Hard to imagine they could get volunteers for that.
ETA: Still, if the drug has been very promising in animal studies and simulations, the actual “best chance for survival” would be to be in the test group and not the control group. (Like, if you were an administrator and had the power to interfere, you’d be tempted to move someone you cared about from the control group to the test group.)
I don’t claim to have detailed knowledge of medical research. I’m thinking of it a little more like a thought experiment but with some basis in reality (unlike, say, “philosophical zombies”).