Edit: You might reframe what friends are for? Common interests are really important, but not an absolute necessity.
They do have this problem. Since childhood they are surrounded by dumb and uninteresting people. Cynicism and distrust in the common sense of the fellow humans are already there by age of 12. But this is unproductive, and they make conscious effort to mingle, so they don't have to be alone all the time, have somebody to mate with, have playdates for their children, but it continues to be a struggle and sacrifice and they continue to stay intellectually alone.
There is a way out though - each typical step in society that is pre-programmed for smart people is also a filter - getting to school for gifted children, good university, then good, hard to get to, company, then changing it to better one filters out dumb people from your acquaintances and makes people around you nicer to talk to and easier to get along with. The downside is that they typically have not so stellar "emotional intelligence" as well, and, depending on occupation, there could be a gender bias (so mating within peer group could be problematic).
Give yourself some credit, you know stuff, and you can know even more if you want to :-)
That is what self growth is all about after all!
I find that having an understanding of human psychology is a critical step towards being effective with this kind of stuff, because it helps you work through the psychology of other people for a common goal (ie, a random conversation with a stranger, job interview, speech, etc).
Without it, your flying blind. When I was younger and flying blind it cost me a number of futures I will never see now.
Humbleness can come off as exploitable and dumb, just as much as it can come off as being intelligent, it's not just what you say, it's also how you say it!
Safe journeys!