Hope you have your asbestos underwear on, you are going to need it!
I happen to agree with your point - It does not matter and is totally irrelevant to Christianity's core beliefs. However, lots of people (including FReepers) seem to be getting their knickers in a real knot about this topic.
When you consider the vastness of space and time, and the infinitesimal nature of that which surrounds us, which constructs us, it is truly a miracle.
So, at one point, after God created the universe, he create the Earth. Then, after a while, he created Adam. Now THAT was a miracle, was it not? Then, from Adam, he created Eve. Zounds - two humans created, neither born of natural parents, and neither born of a "virgin." But - created!
Now you would think that with the creation of two perfect beings, Adam and Eve, the path to eternal life would have been sufficiently explained and none of us would be paying taxes to the IRS. But something went wrong.
Fast forward to the birth of Jesus. Born of a "virgin" mother. Well, ok. But to a God that created the vastness, and smallness, of this universe, that was pretty small potatoes.
Jesus had a life, and a message. Now somewhere during that life it doesn't matter if he had a wife, and children. It doesn't matter if he himself lived and died as a virgin. None of these things matter when you consider that he was born flesh and blood, overcame the base instincts that plague us all, and was resurrected. The message was that since HE did it, we could too!
So somewhere between Adam and Jesus this message didn't get across. Oh, I know that God favored a certain people, and even communicated with their leaders. You would think that God would also give them the same message that Jesus gave.. Maybe he did, and maybe he didn't. Evidently, whatever God told his people, it wasn't enough, or their own religious leaders didn't preach the truth. It seems that Jesus had to come to the Earth to give us the truth. He either added something to the body of religious beliefs, or he changed something. (You know, the oddity here is that at one point God himself gave his message, and the people ignored it. Then, he decided that Jesus should become as a man, and try to get the message across THAT way. You know, talk to the people in their own language, but as a mortal, not a God. That didn't seem to work for some people either!)
The message of Jesus? Believe in him, and you too can escape from Penal Colony Earth and live in Paradise.