Expertise is a good argument. But what do you think makes one an expert in a particular subject?
That isn't as easy to answer as might be thought.
I was surprised when I was first called an expert in my subject in math. I felt like I knew very little and that there were so many open questions still to answer.
But, I was, in fact, an expert on that particular subject: I knew more than most people, even most mathematicians on that particular subject. And I had contributed new knowledge to the subject that surprised other experts.
So, to begin with, to be an expert in a subject, the subject has to be one where knowledge is possible. And, there has to be a way in which that knowledge can be learned. Even then, expertise is relative: an MS in math might well be considered an expert to some people, but would not be so in a group of research mathematicians.
Also, experts can be wrong, even in their area of study. they are human, just like the rest of us, and can make mistakes. When confronted with a new situation, the experts are more likely to be right than others, but it is still possible they will be wrong, especially if that new situation is unexpectedly different than the norm.
And this leads to another thing about experts: they keep learning and updating their information. True experts are very aware of the limits of their knowledge and attempt to push those limits any chance they get. They are much more likely to speak about what is likely as opposed to what is. This is often seen as a sign of doubt and confusion, when it is actually honesty and humility.
Also, I will assume the views you "impose" upon people as an educator are not in opposition to their views, and, for the most part, they are there to learn about the subject you're teaching. I'll guess you don't make it a habit to walk into the history professor's classroom and start "imposing" mathematics on their pupils.
*laughs* That does depend on the class. Many students are 'forced' to pass math classes and feel the subject to be useless to what they want to know. I am the one that stands in the way of their degree. So it is quite likely that many feel I am 'imposing' a viewpoint on them.
One of the goals of education is to change how people think. That can look very similar to indoctrination to those outside (or even those inside).