I think more likely they try to help people, and try to be on their patients' side, and generally consider that if their patient feels they are unfit for work, then it is not for them to decide whether they are or not
I might be wrong like - and I would hope that doctors would not collude with patients in obvious lead-swinging - particularly if this is not ultimately in the best interests of the patients health
I hope if I ever get ill, my doctor will be there to help me not police me