In this case I agree with Gruber. Responding by blogging and citing is better for both websites.
Also, by not hosting my own comments, all public commentary on my writing is thus out of my control. I don't get to block comments I don't like here, or on Mastodon, or Twitter/X, or Bluesky. I think that's actually for the better.
DF is a blog and was conceived that way. HN is a discussion site. The two forms (blogging and internet discussions) are different. They serve different purposes and require different management styles.
The discussions here do seem to be tamped down in some ways, and as a user, that takes something away from the experience.
Relatedly: in general, I think "hypocritical" is not a big gotcha that ends discussions. Different things serve different purposes.