Most observations are naturally subjective, which is why I didn't reply to the objectivity post- I don't think such a thing as true objectivity exists. When people, such as therapists, try to remain objective, it's simply a method of inducing another's subjectivity- and you can say all you want about professionalism, but everyone has an opinion, and that will influence the way the patient/client is dealt with.
Subjectivity usually has to deal with how much experience one has with any particular situation. I have never found myself preganat- therfore I can easily say I am of a pre-life standpoint on abortion. However, if I became pregnnt, having more experience with the situation, my opinion might change due to the subjective nature of the opinion itself. There is also the fact that the knowledge a person has of a particular issue will influence their opinion of it, as well as spiritual beliefs, upbringing, etc.