Why coming out of the closet..has such a challenging fear..
Because it affects all aspects of your life. People look at you in a different way and you are not always accepted. You are judged and you are also not guaranteed happiness or feeling ever-so-wonderful as some admit to being when opening the door to their private life. Opening one door will often close others.
Coming out of the closet sexually and/or religiously is a process that is different for everyone. Fear of being accepted as a changing person exists.