Does being sick or injured skew a patient's objectivity as in agreeing too readily for procedures?

Have company: It is always best to bring a family member or trusted friend along to help you make an informed decision if possible.

Not exactly: They would be the ones in need of most procedures, so hard to say what you are getting at. If they are eager to get better, and their provider (dr/pa/np) counsels them properly w/risks, benefits, and options then should not be unwise or over-eager.