You have completely missed the verbiage that I used. I said that *nothing* doesn't APPEAR to be anything more than a human-made concept. I did not CLAIM that *nothing* does or does not objectively exist. While I certainly don't think an absence of everything / anything could exist, I am issuing zero claim about it.
The opening poster asked this specific question: "Did the universe really come from nothing, aka ex nihilo or was the Buddha right when he said that the universe has no begining and no end?". The correct answer is in fact nobody knows (not just that, the opening poster positions the question as an -OR- question and it's by no means certain that those are the only choices). To know the answer means you have knowledge about the universe / reality that would greatly trump the sum of all scientific knowledge to date. You in particular (nor any other well established crackpot pseudoscientist) do not posess such knowledge.