To be fair, there are doctors that fire patients who wont quit smoking and who arent making strides to lose weight.
While I am not sure I agree with firing smokers and overweight people, smoking and weight do heavily affect most organs and life expectancy.
Not-vaccinating does not.
Most VPD's, whether due to herd immunity or simple disease decline for one reason or another, are very rare.
In the cases where things are not rare (CP, pertussis, influenza come to mind) the vaccine is not overly effective.