I fail to see how one’s question being closed falls under minutiae. Of course, e.g., to the experienced user it may happen that their question being closed as a duplicate is a minutia, as they already noticed the auto-generated comment by the first respective close vote and may have even cast a close vote themselves, but this is a comparably exceptional casecase¹: Questions by experienced users are much less prone to being closed, so this feature request mostly aims at inexperienced users, to which it might be at least educational as to how the system works and who usually are not spammed with notifications anyway. In particular first-time users do not even know how things work around here and might just patiently wait for a mail notification of an answer, while they could and should improve their question instead.
I fail to see what this has to do with the request. This is not about explaining what is going on, but about notifying somebody somebody that something is going on.
¹ As question owners can now unilaterally close their own question as duplicate, this example is outdated.