Then they aren't "chatter and hub-bub of relaxed tribemates", rather to you it is "the whispers and noises of your enemies". Of course that wont get you relaxed. The effect comes from hearing people you are comfortable around talking, if you have a distrustful personality then likely you aren't comfortable around many people but the effect is still there, just that you lack another link.
I agree with gp.
The existence of variation does not disprove the existence of trends.
I don't think it's necessarily valid to expect that all peoples have evolved the same set of instincts. Particularly given adaptation to vastly different environments over the last 200k or so years after leaving africa. This particular instinct would not likely be a prerequisite for survival and may not have occured even among all members of a given tribe.
Technology (especially medical) and civilization are forces that act against evolution; to the extent that they probably seek to stop human evolution.
I suspect that I would have operated on the edge of civilizations many thousands of years ago. I would be more likely to do fringe things, and trade. I've always enjoyed trading, the economic action of it, although I dislike traditional sales. Roaming trader or hunter would be most likely rather than shop owner in a bazaar. The roaming would be ideal for multiple reasons. I also prefer to be awake during the night and always have; I can easily sleep during daylight hours and without a darkened space.
I can confirm that is false.
If it were an actual instinct, I would possess it as would essentially all people. I do not possess that instinct what-so-ever.
I do not gain an increased feeling of safety from the chatter and hub-bub of relaxed tribemates puttering nearby.
That context annoys me, rather than increasing my sense of comfort.
There are multiple types of primary human personalities, not one. I'm a non-tribalist personality type. That means tribes don't tend to like me and I don't tend to like tribes. The tribe and I are not friends, we're closer to suspicious enemies. I disagree with tribal order. By default my personality rebels against tribal structures and most systems like that. I don't do well following others that attempt to command me (tribal systems always have some manner of hierarchy). I operate at a vastly higher degree of effectiveness without lots of other people around. I'm happier and more productive on my own or in small teams.
This isn't a personality I developed over time through great effort. It has been that way at least as far back as 4-6 years of age. I've also spent my life from 15-40 years of age as an entrepreneur. I can be a decent employee, however I dislike it.
I'm a disagreeable personality (to others), as such I'm poorly suited to government, consensus structures, tribal systems, politics and the like. I also don't enjoy asking permission first and I never seek approval from others, I very rarely get a personal sense of reward from the approval of others. That said, the people I do like, I like immensely; and I'm kind toward others who are kind toward me, I believe manners are important, politeness/kindness are important. I used to refer to myself as a lone wolf personality type, as opposed to a tribalist personality type; however that phrase has a particularly negative connotation these days.
I seek to pile up a lot of money to get away from most aspects of society (in a comfortable manner), rather than to sit on top of society or eg receive prestige from a prominent place in society.