Is stuttering natural or really caused by traumatic events? (also hi! i'm new here)

Is stuttering natural or really caused by traumatic events? (also hi! i'm new here) sorry for long post, i think this is the first time i am being honest and speaking about what my speech impediment has affected me i went to a psychiatric appointment for a certain issue (not my speech) but the doctor noticed my stuttering and started asking me questions about it, despite that not being on the topic of the reason i went there, aside from the fact another speech impediment i have is speaking with a quiet voice because it dont like it due to gender dysphoria primarily they were questions about if i had any traumatic event during childhood, such as being bullied (i wasnt), being abused (i wasnt) or seeing something really traumatic (as far as i remember, i wasnt), also asked me if there were any other person with stuttering in my family, and even if my family is quite big i think im the only one who stutters and tbh it did worried me in the past but as time went on and after 3 speech therapists and a tongue surgery (what was my mom thinking?) i just started living with it, most people who are close to me seem to dont care or at least they treat me normally (and im glad!) but i did leave me thinking if my stuttering is just part of me or if something i would need to worry about, i do get moments where it's annoying but it's mostly a "i hope the other person isnt getting mad at me"