I just copy-paste the text and ask AI to summarize for 90% of articles I see on HN. One of the most time-saving uses of AI.
Also, you can often derive the what if you know the why and just follow the thread and map it out.
In any case, reading summaries (and occasionally following up by reading the full article) is more enjoyable and you learn more per unit of time. Most articles are mostly garbage. And even insightful and informative articles can often be compressed with minimal loss of conveyed insight and information. Typical example is some of Paul Graham essays (I say some because only some are worth reading).