I know this is a popular anti-intellectual position, but it's simply wrong. It's possible to reason about the world even without having experienced a specific phenomenon.
I've never experienced life at the nanoscale, but that doesn't mean I can't reason about semiconductor physics. I've never experienced outer space, but I can still reason about it.
The fact that some people have a negative emotional reaction to certain ideas is unfortunate, but ultimately the onus is on those people to avoid centers of intellectual discussion like HN.