This is mostly wrong, because there is only one reality. As trivial as this may sound, if you're interested in reality, then you will invariably get to the same conclusion as many other people. Of course, there will always be some shifts in knowledge and at that time a fringe position can be the right one, but these are rare - very rare, indeed. Generally, the fact that there is one reality means that scientific opinions will converge and they do so fairly quickly. The majority of the work in science is adding a little bit here and there and refining theories, not coming up with radically new theories that contradict existing opinions in a radical way.

I'd be wary about areas in which this is not the case. There are such areas, particularly in the humanities, but these are the ones with major methodological problems.