I understand it wasn't about Tauri specifically, but I still think it's instructive. The implication is, no one does anything serious in Rust, they only post half-baked projects on HN for karma. Which falls pretty flat in a thread about project that's been actively worked on for two years, wouldn't you say?
People are actually building stuff in Rust because they have, for whatever reason, decided they care about that language and ecosystem. There's no requirement that _you_ care about it. But the reasonable response to seeing something you aren't interested in is to do something else, and to leave the discussion to those who are interested. Entering the conversation just to let everyone know you don't care is tiresome and gratuitous.
It's pretty common for people to tag a tool with the language it's written in. It's interesting information. For instance, I don't work with JavaScript, so I'm not particularly interested in what's happening in that ecosystem. Putting JavaScript in the title lets me know I'm probably not the audience. People don't seem to complain about posts like, "Foo: Bar for JavaScript".
The "Rust is for clout" meme exists in the minds of it's detractors, not in the minds of the people who are actually writing in it. So no, it isn't substantive. It's more a form of straw man. "I don't care about this thing, and no one else should either, because it isn't a real language. It's just for karma."
Here's a thought experiment. Let's say that writing something in Rust really is the recipe to hit the front page of HN. Why is it that that works? Can it be for any reason other than there's a lot of people who are interested and want to learn more about it?
And if you're not one of those people - doesn't it make the most sense to just click a different article?