My take on confidence

I just had a highdea about confidence, and wondered what you all would think:
what we call confidence is really a measure of how certain someone is that they won't be kicked out of their "tribe". Everyone (well normies anyway) has a tribe. For some it's family, for some it's a particular group of friends, for some it really is their coworkers.
Now, getting kicked out doesn't necessarily mean you won't be present in the same space, such as work or home, but that you won't really be emotionally connected with that group anymore.

So, people who are very confident feel like they could do very little to be ostracized by their "tribe". In their mind, it's not even really a possibility, or even something that they think about. They think of embarrassment as something that is experienced in a particular moment and then forgotten about, because that's how it usually works for them. They may not think about it on a conscious level, but they know that their place in the tribe is set.
On the other end of the spectrum, without falling off the social scene altogether, are the really nervous types. They've almost certainly been kicked out or kept out of several tribes in their life, be it family, kids at school, clubs, jobs, college classes, whatever. Being excluded again is a very real possibility to them, because they've experienced it often. In their mind, they are always one or two social missteps away from being cut off from what little social contact they have. They experience embarrassment as the beginning of the process of losing their place. It may not actually be the case, but that's how it feels.

From an evolutionary standpoint, I think this makes sense:
For a hunter-gatherer era woman,
A solidified member of a group is a safe bet, so confidence is sexy and attractive.
Being an outcast means a lot more of a struggle to survive, and less of a support network of others, so nervousness/timidity is a turn off.

idk, it's probably dumb or is summed up better elsewhere.