I do have an anxiety disorder so I absolutely get this. A big breakthrough for me through therapy was working on my self worth and realizing that I have inherent value. I can't speak for everyone but I was raised to believe that my worth was really only the sum of my actions in a very utilitarian sort of way rather than a deontological way. I suspect a lot of other young men in my generation were instilled with very similar values. If you know that you existing just as you are is valuable regardless then the social anxiety around not knowing something or being "perfect" tends to melt away (or it at least helps). Perfectionism is a lot more insidious than most folks realize. That said when you get to the place where you can get past that it's quite liberating.