This is purely speaking from my own experience, but I feel like the fears are themselves rationalizations like "oh man why can't I do X, maybe it's because I'm

This is purely speaking from my own experience, but I feel like the fears are themselves rationalizations like "oh man why can't I do X, maybe it's because I'm afraid". They themselves aren't necessarily a root cause. I take medication for ADHD, which actually helps a lot with this. Sometimes those fears and anxieties aren't there, or if they are it's easier to push through to accomplish what needs to get done.