Is the value of a Steam recommendation list the conversation around defining "fun" and how each game conforms with that definition? Or is it a way to quickly find good games you haven't heard of?

When you read an Amazon review, do you think, "well, this will give me some insight into the nature of quality in general?" Or do you think, "I wonder if Arnold35X subjectively liked this vacuum cleaner?"

Of course there's personal value in trying to narrow and understand your own definition of ethical -- you could read through a list like this and pick out the products you agree with, and then ask yourself, "why do I agree or disagree with them?" That would be great.

But OP themselves is under no obligation in this context to justify their decisions to anyone. Their opinion could be, "ethical software has to be written in Lisp." They're here to help you narrow down the software you know, and to find new software. That's it. Curation is not consensus.

This is the equivalent of showing up on an Open Source project and forcing the maintainer to justify their choice in testing libraries. The software is on the list because OP decided to put it there, and because OP is the one that made the list. In the context of this specific list, OP is God. If you think their definition is too broad or ill-defined, make another list with a more narrow one.