HN is not full of morons. I do agree with you that Parler is generally misrepresented, but there is plenty of dissenters here. Things aren't as unbalanced as you perceive.
The majority of the crowd here is very left. Most alternative view points get crapped on hard.
In my experience this site still is a bastion of hardcore "free-speech-extremist" libertarians. More so than Twitter, that's for sure.