Pretty sure the parents weren’t expecting a 50-50 shot of cure vs death. The medical staff downplaying risk and ignoring issues seems like the bigger problem especially for a developmental procedure. If they represented the risk as 1 in 10000 I would probably take those odds. If the actual risk was 1 in 5 and they didn’t convey that it’s pretty messed up.

Getting in your car has risk, so does riding a bike. They shouldn’t be coin flips.