To take a moment: I strongly disagree with the first statement and the second while being true from an optimistic point of view with holistic considerations does not mean that many scientists cannot slow down scientific progress, by diverting efforts into unscientific sidetracks and undemonstrative empirical backwashes, bringing gross wastes of resources by what they choose to study and what they try to demonstrate, biased/ignorant positions.
Like every other human pursuit, activity in the scientific method has its qualities as well as its matters of quantity. By attempting to be as humble, intuitively unbiased, judicious, and rational as possible, scientists can get to answers much more quickly, also get more deeply into the answers to the questions that these answers bring, etc.
Simply put, unbiased scientists can devise more useful experiments.
"...what they try to demonstrate, based upon biased/ignorant positions."
...thought words to that effect were in there.