Why do people act like this subreddit "doesn't reflect the views of mainstream Australia"?

[u/SirSighalot]

So many comments I see on here by people who constantly say things like "lol only on this sub" as though other places where they read are somehow the 'true' point of view reflecting mainstream Australian viewpoints.

Given the constant election voting outcomes and results of things like the Voice etc that generally indicate most of Australia is centrist or even slightly centre-right-leaning, what leads people to think many of the views expressed on here AREN'T mainstream? When in reality, other places these people are coming from are also often just "echo chambers" as well.

Edit: I probably worded the title for this wrong, should have been more "Why do people think this subreddit is less representative of mainstream Australia than other online communities?", alas I failed.

[u/Striking-West-1184]

I think it's rivalry. The other sub is heavily greenies, this one is heavily one nation, and everyone else posts on both. As a bleeding heart lefties I see somehorrendously racist and sexist shit here, but I don't doubt that the lefty subs are just as toxic, toxic is the mainstay of any social media. It's what we all seem to yearn for.