..... To be fair, I don't really care if the vaccine does kill a bunch of people. ...
Hang on, hang on. What if you eventually discovered that the vaccine was killing more people than what it was saving, would you continue administering the vaccine but offer it at a discount rate (ie up front cash only payment)?
Doctors still have obligation to do the right thing - there's the law courts and expert witness testimony by their peers if they get caught out.
