No. Ignaz Semmelweis faced it in the 1800s for daring to suggest (what we know know as germs) made people sick and hand washing could drastically reduce medical complications. He was able to prove it too.
By the end was locked up in an asylum for his ‘crimes’.
Want more recent?
How many stories have you heard of instruments or gauze or whatever left in surgical patients? Of operating on the wrong part or person?
People are fallible. But checklists help a ton. We know that for sure. Why is aviation obsessed with following them? Because they work to increase safety.
Surgeons have resisted them. I don’t know the current state of it, but they were making that exact “good surgeons don’t need it” argument. I remember it being a plot point on an episode of a medical drama (ER? Or maybe Grey’s Anatomy).
There are probably tons of other examples in other fields.