There's nothing wrong with asking about narrow fields. However, it is important to remember that we are Islam—Stack Exchange: Questions and answers are expected to be about Islam, not about whatever niche topic Muslims happen to be interested in.
When I closed the question in question, it wasn't clear exactly what the questioner was even looking for that they would be asking here instead of, say, Physics—Stack ExchangePhysics—Stack Exchange. Obviously I was not the only one who missed that because the existing answers had pretty much no Islamic perspective in them at all, focussing entirely on just explaining quantum mechanics itself.
We as a site are poorly equipped to handle such answers, or questions which should be answered by such answers. If users are coming to Islam—Stack Exchange for an expert explanation of theoretical physics, they are in exactly the wrong place.
I'm sure there's plenty of valid questions in that intersection of theoretical physics and Islam; I'm not even saying that this question wasn't one of them, but it needed more clarity and focus so it wouldn't just attract more answers that, quite frankly, had no place here.