It's not interesting or insightful to take potshots at a project because it's hosted on GitHub.

So one cannot have or express an opinion on hosting as it is a priori and uncontestably lacking in insight and universally uninteresting?

And HNN requires either or both: opinions must be insightful or interesting.

And what is either of those is objective, self-evident, and not even slightly subjective.

Right? How is this not merely a blanket way to assert opinions that are themselves boring and un-insightful ("hosting opinions are forbidden" is the de facto claim)?

Hosting on Github has been an up voted story several HNN times. Yet here its not interesting or insightful.

If the point is "potshots" why not ask or suggest more developed opinions instead of potshotting the potshots? Why not clearly note that "potshot comments on any topic are not optimal" instead of making this seem to be about hosting or what is insightful?

A down vote is not meaningful feedback and clarity tends to work better.

It's downright intolerant to downvote (as opposed to not upvote) a comment which simply advocates values in line with FOSS. I even said I would like to use this program.