As far as I can tell, HN is much more of an extreme monoculture; and one I have to confess I'm rather disappointed in. Instead of thoughtful discourses and commentary from those looking to expand their worldview, it's a strong current of close-mindedness and superiority.
I'm sure that my brief glimpse into the culture of HN is woefully inaccurate and I may certainly have just unluckily gotten the wrong impression from the threads I've read; but I doubt it.
What one may call close-mindedness may be what a community strong identifies as its values.
Regardless, welcome to HN. 12 days is but a blink. Keep participating. If it doesn't jive with you, perhaps you can find it in other communities or one that you start on your own.