I don't think it really matters
I've assumed the wrong gender at times, I don't see the point in not making it visible.
I'd like to offer up a point here... I keep mine unlisted, but in one reply to a thread, I alluded to the fact that I'm a chick. Literally a minute later some dude hit up my inbox fishing for info and generally creeping me out a bit. So there's that... lol
other than that I've always kind of enjoyed not having my gender be immediately visible online, because most people will make judgements, even if it's subconscious. That way, my words are just seen for what they are, coming out of a vague concept of a person. Maybe I have identity issues, idek