Do you believe stuttering is caused by social anxiety?

Do you believe stuttering is caused by social anxiety? Do you believe a stutter is caused by social anxiety? There have been so many theories: social anxiety (like this thread is about), non-diaphragmatic breathing, inhaling while speaking/wanting to speak and many more theories. Here in my country (the Netherlands) there is a course called ‘Del Ferro’, they focus on diaphragmatic breathing and lots of people have reported it worked but a lot of people said it worked for a while and then it went away. My stutter is caused by genetics very likely, people on both sides of my family have it (yeah, bad luck I guess). But if genetics is the cause, is it even possible to totally get rid of it? Since you can’t change your genes. But I don’t stutter when talking to my cat, so is it social anxiety?