I second this. We all have unique brains, and it seems to me that some people are naturally less prone to anxiety than others. I know plenty of people who seem to have naturally low anxiety, and as far as I can tell, they never needed to have some profound realization to become like this, they were likely born this way, they have lucky genetics.

Anxiety means your brain has more of a tendency to worry about potential threats. Possibly because your amygdala are more easily activated. It may just be that, back when we lived in the savannah, being easily aroused by potential threats, and being overly careful, was in many ways beneficial for survival. However, we live in a time of relative safety, and it seems that being someone who worries a lot about potential threats is not generally a useful trait.

I'm not saying that there's nothing you can do to manage anxiety, that is obviously false, but I'm saying there's a strong genetic component, and that judging people who appear more anxious and telling them just suck it up shows a fundamental lack of self-awareness and understanding of how the human brain works.