As near as I can tell, the post is a response to comments in reply to a previous post which essentially states that the _existence of cargo_ is bad because there are bad libraries available.

This post further asserts that folks who like the fact that libraries are easily available are "not very good at something being discussed" and have "Peter Principled" themselves. It also states that they are, "almost rational."

What you're describing is an under-performer, or perhaps someone who is working specifically in a maintenance capacity (likely with a title that reflects that!). I don't think that is what the original post is talking about, but perhaps I have misread.