I love watching the pseudo-scientists squirm when their orthodoxy is challenged. I doubt very highly that you know much about the "scientific process".
Let me tell you out of personal experience how bias enters into the scientific "process". In a former position, we paid an outside agency to perform certain screening measurements for phenotypes "of interest" on lines of mutagenized mice. The lines of animals, and all their screening measurements were made available to staff at the site - a necessity for data entry. There was a vested interest in finding lines of animals exhibiting the phenotypes of interest, and prove the results were reproducible, inheritable, and penetrable. We noticed many false positives in lines where an initial erroneous measure, or simple outlier led over-eager lab staff to "find" more of the same. A classic example of self-fulfilling prophesy. If you believe that in the real world, measurements are taken in a vacuum in pure, completely controlled studies with no possibility of bias, data-massaging, or other corrupting factor entering the collection, analysis, or interpretation of the data, then you are the one living in "la-la" land.