Maryland does require you to submit a notarized letter explaining why you want a permit. Don't just write that you "don't feel safe". You need more reasons than just that. Think about your occupation, your daily activities, the areas where you likely will be, and the level of violence in the areas.
Ideally, we shouldn't have to present reasons why beyond just simply being our 2A Right. However, Maryland wants to know. I'm not sure how much detail is really needed in such a letter to obtain a MD permit. Maybe others can provide more insight and experience.
Good luck.
Ceicei