I understand the urge to summarize, but maybe interested HN users can be expected to read the article before coming to the comments? This seriously degrades the quality of discussion.
I also cherish summaries like these - if I read the whole article I won't remember more than 2 sentences of it tomorrow. That distillation process is inevitable and good. It's a service to do it well for those who are time/memory-limited.
Now I see there are many comments about the content of the article. I don't know if the summary caused more people to read it or not. I wanted to encourage more readership and on-topic discussion.
I can often understand what the article is about and go to the comment section for pros and cons