I like the idea that eventually you can get to the point where you appreciate times that aren’t sunny. As difficult as it is to appreciate it at the time I have learned the most when I have been uncomfortable, and never more proud of myself than when I survived an act of cruelty or injustice. You can’t learn to sail on a lake with no wind. While it is certainly safer it is extremely difficult to make any progress.
I certainly am not comfortable enough with embarrassment or pain that I seek it out. But it is no longer debilitating to me. Well, airport bathrooms and large crowds are works in progress.