I feel this opinion falls into that category
Unless you mean something different, maybe the line could have used some qualifiers. So it's not the opinions themselves that aren't worth listening to, to be clear. It's just that given two people of the same position, the one that's not complaining their opinions aren't getting fair treatment is usually one that can argue their position a lot more clearly and therefore is just generally more worth listening to. Although that's the less-accurate positive version of that preference of mine. In my personal experience, the negative version is almost always on point.
> given two people of the same position, the one that's not complaining their opinions aren't getting fair treatment is usually one that can argue their position a lot more clearly and therefore is just generally more worth listening to
You didn't say "more" or "less" worth listening to, you said "not"