"What scientist or scientific assistant would openly admit to being biased?"
All of them. Honest people should acknowledge they have bias. I follow Dark Horse on Odysee, the Weinstein's. I distinctly recall them noting that researchers need to ensure their research is reproducible, because that enables bias to be overcome. Different researchers have different biases in many respects, and these biases can be compensated for through undertaking the same specific actions to conduct experiments - or are universal and shared between all that conduct the experiment.
There are certain biases that are universal to humanity, and are therefore difficult to overcome experimentally, which limits the ability of the scientific method to advance in ways such biases preclude.
"The arts (anything in the realm of spiritual consciousness) are, in my view, relegated to their own corner from school and university life and are not really considered (or their work published or funded) by natural scientists as influencers of health and disease (or more generally, "consciousness")."
There are scientific means of measuring the health benefits of the arts. Both prayer and music (and probably more) have been shown to be beneficial to health through experiments that quantify health outcomes and contrast control groups with groups that use prayer or listen to music. However, this does not mean that artists' feelings about their art, nor religious dogmas, are verified. Experiments that differentiate and can falsify specific predictions have not been able to be designed for those purposes, AFAIK.
I doubt you would be able to conduct experiments that seek to falsify such dogma today in any academic environment. People get stabby over such things. Ask Salman Rushdie.