You don't quite seem to understand the mechanisms of debate, or even communication between intelligent entities in general.
By definition the words a person can speak ( or write, as it were ) is a tiny subset of everything they think or mean. Likewise, the words we hear ( or read, as it were ) are a tiny subset of the thoughts those words lead to.
So you have two minds, with huge models within their minds of what the argument in question really entails, sharing information in a tiny channel. The only way we can function is to extrapolate more meaning and subtext from that tiny channel than there is on the face of it.
This isn't anything new, or even limited to humans. Think about it -- when a dog bears its teeth, other dogs don't think "he is just making a facial expression that exposes his teeth, that is all there is to it." They infer a ton of meaning from that simple expression, and rightly so.
So in a discussion like this, for instance, knowing someone's personal position is invaluable in extracting the proper meaning from any statement they make. If I hear someone like drkitten or yy2bggggs or darat make a statement about science, for instance, I am likely to take it on face value. If I hear them make a statement about non-science, I doubt their authority on it, and my thoughts would be flavored by that doubt. Conversely, if someone like westprog or punshhh makes a statement about science, I doubt their authority and it flavors my thoughts and responses -- only because I know that they are non-scientific people. And on the extreme end, if someone like !kaggen makes an argument that references science in any way I instantly dismiss it as being incorrect. I don't even need to spend time trying to understand the argument in such an extreme case, I know it is wrong apriori.
If you have non-scientific tendencies, and you ask a question that seems scientific, but you are really asking it as part of some wedge argument you seek to use, it really matters. In cases like that a simple scientific answer isn't sufficient. In cases like that the answer needs to be "here is the scientific answer, and let me head you off that train of thought you were going down, because it is wrong in all these other ways."