The following story is almost utterly worthless in itself (I don’t know the source), but the point is the story was taken seriously, and it influenced people’s thinking.
A generally serious Torah scholar told me he heard someone once came to the Brisker Rav to tell him about a kashrus problem with bakeries. So, what was the response of the Brisker Rav, known for his Yir’as Shamayim (except wherever halacha conflicted with so-called holy “Minhag”)?
He said: Don’t mess with bread!
As they say, “I don’t know if it happened, but they don’t tell such “inspiring” stories about the Chazon Ish…”