I find this to be an incredibly unsatisfying answer. What so you MEAN it's been around forever? where did it COME FROM, for fuck's sake?
I'm fine with saying "we need to go completely back to the drawing board on our theory (big bang) because it doesn't work and makes no sense". I have no problems with that, I'm not attached to the theory and it's got gigantic holes in it anyways.
However, this is not an answer. Matter can't be created, I know, but how does the answer "well, it's just always been there" satisfy anything other than a philosophical explanation? What about Entropy? if the universe has been around literally forever, shouldn't there have been a heat-death of the universe by now?
This is like saying that Storks bring children.