Sure we do, its called culture. My parents were immigrants so I got to see two systems compete, their native culture and US mainstream culture. There's a lot of info here on how to live, if anything its overwhelming.

I think the idea that we're all winging it on some certain level is pretty different from a feeling like an imposter. I don't feel like any kind of imposter in my day to day life.

If I do feel 'imposter syndrome' its at work and largely because we have, in the US, an anti-worker climate where we're expected to be instant experts on everything, especially if you're in tech. A realistic outlook on what staff can do doesn't benefit management as much, so they don't help dissuade the myth of the IT/dev superman. They'd rather you near burn-out trying to be a 5x multiplier than hire 5 more guys. We often talk about imposter syndrome at work, but rarely its principle driver. Its not "my teachers said I was smart and can do anything" but very deliberate policies that help businesses maximize profit at the expense of the wellbeing of their own staff.