Avira > Let’s look at it from a bochurs perspective.
you may be right that we have biases. MOs have a bias to follow “science” and can be biased to follow them into danger. More conservative groups have the bias of “tradition”. Obviously, Torah rulings change when facts (or our knowledge of them) changes. So, it is culturally hard to stop smoking if a heilige rosh yeshiva from previous generation did. And, after you read or hear enough of hagiographies about gedolim who were always right in everything, it becomes a statement of faith: if I stop smoking, I am betraying my Rosh Yeshiva.