I consider it a little dangerous to rely on a single news source. Granted HN as an aggregator is better than relying on a single paper but it's still a bit unhealthy to read all news in a HN framing (assuming you read comments+newsitem). Even if you just use it as an aggregator it's still fairly selective.

Additionally, HN is very "high level". I don't know how involved you are in the community you live in but I always consume at least one "hyperlocal" paper (+local radio) to stay up to speed on the things that happen in my immediate neighborhood.