Hi Anna72914,
I understand where you are coming from. I also understand why the "young" comment irritated you. I think what the person meant (please correct me if I misinterpret), that as we grow up and the process of socialisation is absorbed, most people learn to regulate their emotions. Most, not all. Emotional regulation is difficult for many of us with MIs. People can learn to regulate their emotions, and choose their reactions, but you have to be in the right headspace, and it is a lot of work. It is something I struggle with, and I'm 48.
This is what I'm working on with my T.
Funny thing, I am a teacher, and at work, I have no problems. At home with my family, where my emotions are much closer to the surface, I struggle.