I'm still reading, but as I go through the sight vs sound section I am reminded of how weird my cats seem to be (especially the male). He seems to have none of these risk assessment/survival instincts at all unless we are at the vet's office. At home, whether inside or on the balcony, he simply behaves like there is no danger from anything, ever. If he hears a new sound he will likely go toward it rather than away, a…
Many housecats are like that, simply absolutely confident that their own territory is totally safe because that’s all they have ever experienced.
In actuality he's been through some really rough times at vet hospitals as a kitten (and that's why he reacts differently with vets), so it is an extra relief that he came out of that so well-adjusted at home.