When you come from an echo chamber then a fair place will look like an echo chamber against your views.
I've seen posts from most views get upvoted to the top here. Compare to for example r/politics, I've never ever seen a conservative post get even close to the top there. That is what an echo chamber looks like, here on HN you will get exposed to good arguments from most sides.
Wait, you think HN isn't an echo chamber? That's amazing.