“Opponents of evidence-based medicine have frequently argued that no one would perform a randomized trial of parachute use. We have shown this argument to be flawed, having conclusively shown that it is possible to randomize participants to jumping from an aircraft with versus without parachutes (albeit under limited and specific scenarios).”
Read it and weep. (Or laugh, whichever helps you sleep better.)
From Parachute use to prevent death and major trauma when jumping from aircraft: randomized controlled trial:
Read it and weep. (Or laugh, whichever helps you sleep better.)