That is a really nice way of putting it. I was a very shy person for most of my life. I am still riddled with self doubt, anxiety, self deprecation, and humiliation. However, this is the approach I took. It will work for some, not for others.
Acknowledge that 3 out of 4 interpersonal relationships, projects, whatever, just won't work. Avoid the weeds, the why's, the self incrimination. This is the same set of feelings as it is for me, you, Robert Downey Jr., Hedde Lamar, Muhammad Ali, Barack Obama, ghandi, you name it. Most things, including interpersonal relationships, just don't work.
If a person can internalize that, then they realize, "it's not you, it's not them, it just is", and you stop fighting it like you stop fighting gravity. And in my opinion, that is the breakthrough regarding shyness.
Now, I need to be exceptionally blunt: if you are shy, and you like it or it defines you, that is awesome. It is not a defect, you don't have to change if you don't want to. And if you are shy, and just want a safe person to talk to, let me know