As far as I know it is the default state for many many people. The only clear exceptions I can think of is relativism. Even then, people tend to be relativists about particular subjects only (champions are politics and religion, where "respect" for the other's view is paramount, and plain telling them they are mistaken is often interpreted as offensive and intolerant).
The rest of the time, we just have a very hard time abandoning our beliefs. (I know It'd be hard for me to admit that functional programming is not superior to class based programming most of the time, even in the face of compelling evidence. I'd be likely to search for an escape hatch first.) It's truth that's important, but, probably because of the mind projection fallacy, we mistake our beliefs for truth, and therefore holds our current beliefs dear, which is rather silly when you think about it.
By the way, if being dropped in other bubbles compels you to find stronger arguments for your own, beware that those stronger arguments may actually be unjustified rationalizations. That would be a bad thing. Better change your mind in that case.
Fortunately you can train: http://wiki.lesswrong.com/wiki/How_To_Actually_Change_Your_M...