Yes. The signal does come with some noise, but I've found HN incredibly valuable for my professional and career development. I spend quite some time here but I think it's worth it.
HN pretty frequently has posts from senior engineers or senior managers sharing things they've learned over long careers, which I feel has given me a shortcut into many of these insights.
Without HN, I would not have been as aware of how hot the developer market is at the moment, or what common salary levels are around the world. I'm starting a new job next week, through a startup that I found because it advertised a role on HN, at significantly higher compensation than my previous job.
Comments on HN have given me a lot of insight into how people approach things like contract negotiation or how they deal with conflict or frustration in the workplace. Often these comments come from a place of experience with patterns recurring over many positions at different organizations. I'm heading into (only) my third job so these experiences are valuable to read about.
Beside that I've also found many resources that were just fun or intellectually stimulating here.