Which in part is fine if these beliefs are benign.
The problem is beliefs form our world views & do impact upon behaviour, almost all religious beliefs rely heavily on concepts such as good & evil.
But as our understanding of the human condition progresses, these labels become increasingly unreconcilable with the reality of the world.
I mean for example, if we identified a series of genetic markers, epigenetic links or chemical make-ups, or developmental triggers during early childhood which results in violence or criminality.
Do our existing & religious concepts of good & evil still have value in today's society? - while a person may indeed hold beliefs which are in isolation benign, those beliefs are not as compartmentalised as people like to think.
To have these important discussions about society, human behaviour, the concepts of good & evil - if we do or not have free will or not - having a section of society who believes they already have an answer to these question isn't helpful or constructive (as much progress can or has already been made in these fields which already undermine in part these assumptions).
These are not just matters for philosophy or people with too much time on their hands, these questions really do matter on how we structure our society - our entire criminal justice system specifically is founded upon certain concepts which are not supported by empirical evidence.
Accepting a stance as a matter of fact without evidence isn't a good trait to posses - as it ignores the very real problem of human fallibility, to progress & advance in this world we need to know our limitations & failings at an individual level.