Stop wondering and
start requesting. Not only is it not true that "only Hillary's ever get released," but if you want someone else's, and they're subject to FOIA, nobody's stopping you from getting them. Drop the persecution complex, already.
EDIT: And I'm not making a "nothing to hide argument," by which I take you to mean something like, "If she has nothing to hide, she should release the emails." I'm not talking about her, but about you. Are you really so disinterested in seeing what those emails contain? If they turn out to be completely innocuous, can I expect that you will
not tout that fact? Or are you only interested in things that further your own political beliefs, and conveniently bored by things that tend to work against it?