The core issue will always be personal responsibility. If a doctor misrepresents risks or benefits, they were legal authorities on the matter. They were obligated to offer the best advise as doctors.
jw’s dont claim any medical advice for the sake of health. They frame it all as “spritual” advise, up to and including saying that not taking blood may kill you in this life but you will brought back in the next. You cant disprove that. Its up to us as individuals to weigh the spritual vs physical. The courts wont interfer in that... and thus it becomes our personal responsiblity.