I went to school with many people who thought like this, because this is what they were shown/taught their entire life.

In fact, I still get 50+ year olds who ask me this same question, and they live 10 miles away.

It's a limited sight thing, and it comes from a mind that doesn't understand nor has the experience/insight.

It's a fair question assuming that they don't have the same experience or background as us.