Using the scientific method, meta-studies and suchlike our species has built an enormous corpus of knowledge, I'm happy to let that evolving concensus be the basis of our decisions.
For example the fact that vaccines do a more good than harm by an order of magnitude is no longer up for debate. There is a lunatic fringe who disagree, their unfounded fiction should not be shown to curious first time parents on google.
To insist that everyone can pick and choose reality and that we should all be wary of "facts" is to cause real harm.
