I don’t know what quick look is, but you file explorer has file previews yes? Why are they not sufficient? How does quick look differ?
If file thumbnails are not sufficient, you can open the file to look at it yes? Why is it not sufficient? How does quick look differ?
Like, if you don’t give me an explanation of the problem and how the envisioned solution fixes it, how can I evaluate pros and cons and potentially implement it?
If you can’t or are not willing to answer very simple questions on a product you are wishing for / requesting, how can anybody reason about it and help making it happen, or support the cause for its creation?
Not pointing fingers at anyone by the way, just explaining why this response is so common and why, in my opinion, perfectly reasonable.
Asking why is not synonym with “no, use ” and more about “in which way is failing to provide a solution?”