Does “moot” only apply to points?

I recently asserted on my blog that a distinction was moot. The sentence:

Granted, the distinction between system and package manager maintained assets is moot on Linux distros, as they're all updated from apt-get, yum and so on.

People have commented on my allegedly incorrect use of moot, claiming that the distinction itself can't be moot, only the point of the distinction.

I've already read about moot points. Should I rephrase the sentence using moot point? In the contemporary context, would I be correct when describing things as moot?

Solution 1:

M-W (sense 3) defines moot as "not certain : argued about but not possible for people to prove." Based on this, differentiating between an argument and its "point" seems, well, pointless (at least in terms of everyday use). Google Ngrams show that both (...) is moot as well as is a moot (...) are in usage, the latter prevailing in the last decade.