As of this writing, the majority of root-level comments are some mix of extreme cynicism and knee-jerk reactions. But you're right, at least they're downvoted.
I think the reason is that most of HN is not very knowledgeable of manufacturing generally (one commenter was shocked at spending $400m on a factory), combined with hatred for Peloton (for whatever reason) specifically.
I don't agree with the comments in question but downvoting them to oblivion is a bit harsh and uncalled for. It's like that scene from the high school movie trope where a group of kids tells another kid they can't sit at their lunch table.
That would be more like downvoting an account or a person. Downvoting a comment simply signals that there's something wrong with the comment. If the next comment is fine, it's welcome at the lunch table.
