Laypeople should not think that scientists are unemotional unbiased people. They have biases and as bigoted as some of us. Scientists are into the politics of ideas. They are into band wagon and what is the "flavor of the month theories". They are swayed by popular ideas just like any of us. In fact most of them follow the crowd, or the mainstream, it is good for their career.
Some laypeople think that scientists are active passionate seekers of the TRUTH. You have to laugh because right now, some of them do not have a definition of TRUTH. Most do not even adopt such category in their mental machinery.
What do I mean by politics of ideas? I mean, scientists throw their weight on a particular theory not because they have investigated the merits of such a theory but because it is popular, i.e. since lots of people are into this stuff, so they reason, then it must be good and worth their time. This happens so much so that if you present an idea that is even vaguely challenging the popular view, they look at you as a moron, someone not to be taken seriously. They did this to Godel and Einstein.
I come from a traditional mathematical background, I was taught to look for elegance. Even in my programming practice I strive for it. What do we mean by elegance? We mean it is the simplest solution to a problem. However, most scientists are not convinced that the simplest solution is usually the answer to a complex problem. Simplicity is beauty.
Let us remember scientists have presuppositions and biases, they are human beings just like the rest of us; the smartest ones recognize their biases and have learned to be skeptical of themselves.